140 partion rl 26 6.5 creedmoor help.

[Michael C. Smith]

Hey guys going to see if any one had experience with this combo. Would like to have a safe starting point. If someone could please run a quickload that would be great too.
6.5 creedmoor
Nosler 140 partion
Peterson brass 50.2 water capacity
Rl 26 I also have imr 4451 and h4350
22 in barrel.
Not sure on coal till i get home and measure. This rifle has a very long throat. I am going to try and pick up some bullets today so I will have a better idea on overall length tonight. I have been trying the 125 pt but haven't been able to get them to shoot any better than about 1.5 so I thought I would try the 140. The 125 pt is being very erratic. 2 almost touching and then one way out and it's never the same shot. Generally it's about a 1.5 out. This will be the first 140g bullets I have shot in this gun. I have data for h4350 and have some powder. I thought I would try rl 26 with the 140 so maybe I can get the most velocity possible. Thank you for any help.

Michael.

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[DrMike]

Cartridge          : 6.5 Creedmoor Hornady
Bullet             : .264, 140, Nosler PART SP 16321
Useable Case Capaci: 47.824 grain H2O = 3.105 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Alliant Reloder-26

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.0   95    45.18   2595    2094   42219  11835     98.4    1.331
-09.0   96    45.68   2628    2148   43833  11944     98.7    1.307
-08.0   97    46.18   2662    2202   45522  12045     99.0    1.284
-07.0   99    46.69   2695    2257   47283  12137     99.3    1.262
-06.0  100    47.19   2728    2313   49125  12220     99.5    1.239
-05.0  101    47.69   2760    2369   51049  12294     99.7    1.217
-04.0  102    48.19   2793    2425   53062  12359     99.9    1.196
-03.0  103    48.69   2826    2483   55168  12415    100.0    1.175  ! Near Maximum !
-02.0  104    49.20   2859    2540   57373  12460    100.0    1.154  ! Near Maximum !
-01.0  105    49.70   2891    2598   59684  12497    100.0    1.133  ! Near Maximum !
+00.0  106    50.20   2923    2657   62104  12532    100.0    1.113  ! Near Maximum !
+01.0  107    50.70   2956    2716   64642  12565    100.0    1.094  !DANGEROUS LOAD-DO NOT USE!
+02.0  108    51.20   2988    2775   67305  12596    100.0    1.074  !DANGEROUS LOAD-DO NOT USE!
+03.0  109    51.71   3020    2835   70103  12626    100.0    1.055  !DANGEROUS LOAD-DO NOT USE!
+04.0  110    52.21   3052    2896   73042  12655    100.0    1.036  !DANGEROUS LOAD-DO NOT USE!
+05.0  111    52.71   3084    2956   76131  12682    100.0    1.018  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba    106    50.20   3061    2912   79199  11926    100.0    1.016  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    106    50.20   2711    2285   48226  12795     96.7    1.242

 

[DrMike]

Some addition data

Cartridge          : 6.5 Creedmoor Hornady
Bullet             : .264, 140, Nosler PART SP 16321
Useable Case Capaci: 47.824 grain H2O = 3.105 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon H4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.0   92    39.69   2492    1930   45888   9842     96.1    1.298
-09.0   93    40.13   2518    1971   47330   9951     96.5    1.279
-08.0   94    40.57   2544    2013   48816  10057     96.8    1.261
-07.0   95    41.01   2571    2054   50349  10159     97.2    1.243
-06.0   96    41.45   2597    2097   51930  10259     97.5    1.225
-05.0   97    41.90   2623    2139   53560  10355     97.8    1.208
-04.0   98    42.34   2649    2182   55242  10448     98.1    1.191  ! Near Maximum !
-03.0   99    42.78   2676    2225   56977  10538     98.4    1.174  ! Near Maximum !
-02.0  100    43.22   2702    2269   58767  10625     98.6    1.158  ! Near Maximum !
-01.0  101    43.66   2728    2313   60614  10707     98.8    1.142  ! Near Maximum !
+00.0  102    44.10   2754    2357   62521  10786     99.0    1.126  !DANGEROUS LOAD-DO NOT USE!
+01.0  103    44.54   2780    2402   64490  10861     99.2    1.110  !DANGEROUS LOAD-DO NOT USE!
+02.0  104    44.98   2805    2447   66523  10933     99.4    1.095  !DANGEROUS LOAD-DO NOT USE!
+03.0  105    45.42   2831    2492   68623  11000     99.5    1.080  !DANGEROUS LOAD-DO NOT USE!
+04.0  106    45.86   2857    2537   70793  11063     99.7    1.065  !DANGEROUS LOAD-DO NOT USE!
+05.0  107    46.31   2883    2583   73035  11123     99.8    1.051  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba    102    44.10   2862    2546   73364  10488    100.0    1.052  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    102    44.10   2604    2108   51870  10600     94.3    1.222

Cartridge          : 6.5 Creedmoor Hornady
Bullet             : .264, 140, Nosler PART SP 16321
Useable Case Capaci: 47.824 grain H2O = 3.105 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : IMR 4451 Enduron

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.0   86    37.53   2483    1916   46509   9629     96.8    1.291
-09.0   87    37.95   2508    1955   47888   9732     97.2    1.273
-08.0   88    38.36   2533    1994   49306   9834     97.5    1.255
-07.0   89    38.78   2558    2033   50763   9932     97.8    1.238
-06.0   90    39.20   2582    2073   52262  10028     98.0    1.222
-05.0   91    39.62   2607    2113   53803  10121     98.3    1.205  ! Near Maximum !
-04.0   92    40.03   2632    2154   55389  10212     98.5    1.189  ! Near Maximum !
-03.0   93    40.45   2657    2194   57019  10299     98.7    1.174  ! Near Maximum !
-02.0   94    40.87   2681    2235   58696  10384     98.9    1.158  ! Near Maximum !
-01.0   95    41.28   2706    2276   60422  10465     99.1    1.143  ! Near Maximum !
+00.0   96    41.70   2730    2318   62198  10543     99.3    1.128  ! Near Maximum !
+01.0   97    42.12   2755    2359   64025  10618     99.4    1.113  !DANGEROUS LOAD-DO NOT USE!
+02.0   98    42.53   2779    2401   65906  10690     99.6    1.099  !DANGEROUS LOAD-DO NOT USE!
+03.0   99    42.95   2804    2443   67843  10759     99.7    1.085  !DANGEROUS LOAD-DO NOT USE!
+04.0  100    43.37   2828    2486   69837  10824     99.8    1.071  !DANGEROUS LOAD-DO NOT USE!
+05.0  101    43.79   2852    2528   71890  10885     99.9    1.057  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba     96    41.70   2828    2486   71890  10267    100.0    1.060  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     96    41.70   2596    2094   52579  10403     95.2    1.217

 

[Michael C. Smith]

Dr. Mike thank you for your time and knowledge. By far rl26 is going to get me the most velocity. What is your opinion on the Partition does it like to be pushed to max velocity or does it seem to like the lower velocity. As far a seating depth I guess I need to start at the lands and go back from there. What do they normal like as far as jump?

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[DrMike]

Michael,

Mark graciously pointed out that I submitted a case capacity based on SAAMI measurements. If I adjust for 50.2 grains H20 capacity, it yields a significantly lower charge.

Cartridge          : 6.5 Creedmoor Hornady
Bullet             : .264, 140, Nosler PART SP 16321
Useable Case Capaci: 44.519 grain H2O = 2.891 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : IMR 4451 Enduron

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.0   88    35.73   2445    1859   46360   9137     96.2    1.290
-09.0   89    36.13   2470    1897   47758   9238     96.5    1.272
-08.0   90    36.52   2495    1936   49196   9337     96.9    1.255
-07.0   91    36.92   2520    1975   50677   9433     97.2    1.237
-06.0   92    37.32   2545    2014   52200   9527     97.5    1.221
-05.0   93    37.72   2570    2053   53769   9619     97.8    1.204  ! Near Maximum !
-04.0   94    38.11   2595    2093   55384   9707     98.0    1.188  ! Near Maximum !
-03.0   95    38.51   2620    2133   57048   9793     98.3    1.172  ! Near Maximum !
-02.0   96    38.91   2644    2174   58760   9877     98.5    1.156  ! Near Maximum !
-01.0   97    39.30   2669    2214   60525   9957     98.7    1.141  ! Near Maximum !
+00.0   98    39.70   2694    2255   62343  10034     98.9    1.126  ! Near Maximum !
+01.0   99    40.10   2718    2297   64216  10109     99.1    1.111  !DANGEROUS LOAD-DO NOT USE!
+02.0  100    40.49   2743    2338   66146  10180     99.3    1.096  !DANGEROUS LOAD-DO NOT USE!
+03.0  101    40.89   2767    2380   68136  10248     99.4    1.082  !DANGEROUS LOAD-DO NOT USE!
+04.0  102    41.29   2791    2422   70187  10313     99.6    1.068  !DANGEROUS LOAD-DO NOT USE!
+05.0  103    41.69   2816    2465   72303  10374     99.7    1.054  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba     98    39.70   2793    2426   72258   9800    100.0    1.057  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     98    39.70   2557    2032   52554   9853     94.4    1.215



Cartridge          : 6.5 Creedmoor Hornady
Bullet             : .264, 140, Nosler PART SP 16321
Useable Case Capaci: 44.519 grain H2O = 2.891 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon H4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.0   94    37.80   2454    1871   45624   9332     95.3    1.297
-09.0   95    38.22   2480    1912   47085   9438     95.7    1.278
-08.0   96    38.64   2506    1953   48593   9542     96.1    1.260
-07.0   97    39.06   2532    1994   50149   9642     96.5    1.242
-06.0   98    39.48   2559    2035   51756   9740     96.9    1.224
-05.0   99    39.90   2585    2077   53416   9834     97.2    1.206
-04.0  100    40.32   2611    2120   55131   9926     97.5    1.189  ! Near Maximum !
-03.0  101    40.74   2638    2163   56902  10014     97.8    1.172  ! Near Maximum !
-02.0  103    41.16   2664    2206   58731  10099     98.1    1.155  ! Near Maximum !
-01.0  104    41.58   2690    2249   60623  10181     98.4    1.139  ! Near Maximum !
+00.0  105    42.00   2716    2293   62577  10259     98.6    1.123  !DANGEROUS LOAD-DO NOT USE!
+01.0  106    42.42   2742    2337   64599  10334     98.8    1.107  !DANGEROUS LOAD-DO NOT USE!
+02.0  107    42.84   2768    2382   66689  10405     99.0    1.092  !DANGEROUS LOAD-DO NOT USE!
+03.0  108    43.26   2794    2427   68852  10472     99.2    1.077  !DANGEROUS LOAD-DO NOT USE!
+04.0  109    43.68   2820    2472   71089  10536     99.4    1.062  !DANGEROUS LOAD-DO NOT USE!
+05.0  110    44.10   2846    2518   73405  10595     99.5    1.047  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba    105    42.00   2827    2485   73683  10013    100.0    1.049  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    105    42.00   2564    2044   51679  10030     93.4    1.220



Cartridge          : 6.5 Creedmoor Hornady
Bullet             : .264, 140, Nosler PART SP 16321
Useable Case Capaci: 44.519 grain H2O = 2.891 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Alliant Reloder-26

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.0   98    43.11   2555    2029   41797  11285     97.7    1.328
-09.0   99    43.59   2589    2083   43421  11397     98.1    1.304
-08.0  100    44.07   2622    2137   45119  11502     98.5    1.280
-07.0  101    44.55   2656    2192   46895  11598     98.8    1.257
-06.0  102    45.03   2689    2248   48755  11686     99.1    1.234
-05.0  103    45.51   2722    2304   50701  11765     99.4    1.212
-04.0  104    45.98   2756    2361   52740  11835     99.6    1.190
-03.0  105    46.46   2789    2419   54876  11895     99.8    1.168  ! Near Maximum !
-02.0  106    46.94   2823    2477   57119  11947     99.9    1.147  ! Near Maximum !
-01.0  107    47.42   2856    2535   59472  11988    100.0    1.127  ! Near Maximum !
+00.0  109    47.90   2889    2594   61945  12019    100.0    1.106  ! Near Maximum !
+01.0  110    48.38   2922    2654   64539  12045    100.0    1.086  !DANGEROUS LOAD-DO NOT USE!
+02.0  111    48.86   2955    2714   67271  12068    100.0    1.066  !DANGEROUS LOAD-DO NOT USE!
+03.0  112    49.34   2988    2775   70145  12091    100.0    1.047  !DANGEROUS LOAD-DO NOT USE!
+04.0  113    49.82   3020    2836   73173  12111    100.0    1.028  !DANGEROUS LOAD-DO NOT USE!
+05.0  114    50.30   3053    2898   76364  12129    100.0    1.009  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba    109    47.90   3031    2856   79054  11395    100.0    1.009  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    109    47.90   2670    2216   48309  12157     95.8    1.234

Do take note that these charges are considerably lower than originally projected. Again, thank you, Mark, for catching this.

 

[Michael C. Smith]

Thank you. The fired water capacity 50.2. I will get a measurement tonight on overall length it is going to be a lot longer than 2.800 so that will free up a little space also. That did make a big difference on the charge weight.

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[TackDriver284]

Mike, you are welcome, I would always help out in any way I can.

Seems like RL-26 will have some compression, a drop tube should help. Velocity looks amazing too. H4350 has been scarce, and lots of shooters are loving the IMR 4451 as a substitute for H4350

Michael, keep us posted on your results.

 

[SJB358]

I haven't tried the 140 Partition in the CM, but as long as your bullets are seated straight I wouldn't worry too much about the jump into the rifling. For the most part you just have to kick the Partitions in base with either a faster powder, or a slower powder towards the upper end. Both of those seem to get them to shoot pretty well in just about all of my rifles. They haven't been fussy for me.

26 has worked well with the 147 ELD's for me, so I would guess it should be good with the 140 Partition. It will be a full case load. It does make speed pretty nicely though.

 

[Michael C. Smith]

Alright guys went and shot at lunch. These 140 partion shot a lot better than the 125g or! Everything was around a inch or so with the exception of 46.2 I would say it's a half inch. The few things I noticed is everything is shooting a tringale pattern with all loads except the 46.8 load which could have been me. This load work up was with rl26. The cbto was 2.470 I am 5 thousand off the lands. I also noticed my barrel stayed a lot cooler with this rl 26 than it does with h4350. I don't have a good chrony but will try to get my hands on one and see where I am on velocity. I guess my next move will be to load up some more of 46.2 load and see if I can duplicate that group. I think I read on here something associated with seating depth and triangle shaped groups can someone refresh my memory on that. Any advice would be great on what y'all see in the picture and anything else I should do.

Thank you
Michael

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[SJB358]

Usually if it’s a perfect triangle you wanna go towards the lands. If you get two close and 1 out yiu wanna move away from the lands.

46.2 looks great from here. That’s not a bad spot to be with a Partition.

 

[Cleveland48]

46.2 does look great!


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[Michael C. Smith]

Usually if it’s a perfect triangle you wanna go towards the lands. If you get two close and 1 out yiu wanna move away from the lands.

46.2 looks great from here. That’s not a bad spot to be with a Partition.

Thank you. I am going to load up some more of the 46.2 tonight and see if I can duplicate the group. I may also try above 47g. Didn't see any psi signs. Probably try up to 47.5. I am just 5 thousand off the lands now so I really don't want to get any closer. According to the quick load that Dr Mike did for me the 46.2 gr load should be around 2760fps or so. These are by far the best groups I have gotten with the Partition bullets.

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[Michael C. Smith]

I shot this 4 shot group to verify the 46.2 g load of rl26 from yesterday. The load from yesterday was just a little tighter but I am still good with this one. I also shot 47.5 and that is the 3 shot group. I may need to revisit it also. I will gain about 150fps according to the quick load that Dr Mike did for me. I am really beginning to like this rl26. I am also excited to finally get a nosler Partition to shoot in my rifle!! I just wish it was still hunting season so I could shoot a deer with it. It's going to be a long time till November!

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[lhsako]

Mike, you are welcome, I would always help out in any way I can.

Seems like RL-26 will have some compression, a drop tube should help. Velocity looks amazing too. H4350 has been scarce, and lots of shooters are loving the IMR 4451 as a substitute for H4350

Michael, keep us posted on your results.

>>>> I just love my drop tube !!!!