Remington 7mm mag in the CDL (26" barrel)

sask boy · Oct 19, 2015

Well as I stated here is my post asking for help. I have 2 boxes of 168gr. ABLRs ready for loading.
I have fare number of powders to choose from as I have my old stand by IMR4350, RL-22, IMR7828ssc, also a couple of pounds of IMR4831sc along with RL-15.
So for any of our guys & gals that load for this little lady please feel free to let me know.
I have loaded for the 7mm mag for a number of years using 160gr ABs over top of 60.0grs. of IMR4350 but my nephew stated he would like to try these new ABLRs and so would I as we are going to try some longer shots this coming season if the opportunity arises.
Austin has placed the Zeiss HD5 3-15 X 50mm in the ZR800 plex on his rifle so he thinks he is ready!!
Thanking everyone in advance for the help that will be coming

.

Blessings,
Dan

Dwh7271 · Oct 19, 2015

If the burn rate is right on the QL (which it usually isn't!) somewhere around 63.2 should be nice with RL22.

Code:

Cartridge          : 7 mm Rem. Mag.(SAAMI)
Bullet             : .284, 168, Nosler Accubond LR 58623
Useable Case Capaci: 70.870 grain H2O = 4.602 cm³
Cartridge O.A.L. L6: 3.250 inch = 82.55 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Alliant Reloder-22

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    56.88   2654    2628   40694  10715     97.4    1.538
-09.0   87    57.51   2683    2686   42014  10827     97.8    1.516
-08.0   88    58.14   2712    2744   43370  10935     98.1    1.493
-07.0   89    58.78   2741    2802   44765  11040     98.4    1.471
-06.0   90    59.41   2769    2861   46205  11139     98.7    1.450
-05.0   91    60.04   2798    2920   47689  11235     98.9    1.428
-04.0   92    60.67   2826    2980   49220  11325     99.2    1.407
-03.0   93    61.30   2855    3040   50799  11411     99.4    1.387
-02.0   94    61.94   2883    3101   52428  11493     99.5    1.367  ! Near Maximum !
-01.0   95    62.57   2911    3162   54108  11569     99.7    1.347  ! Near Maximum !
+00.0   96    63.20   2940    3223   55842  11640     99.8    1.328  ! Near Maximum !
+01.0   97    63.83   2968    3285   57631  11706     99.9    1.309  ! Near Maximum !
+02.0   98    64.46   2996    3347   59478  11767     99.9    1.291  ! Near Maximum !
+03.0   99    65.10   3023    3410   61383  11823    100.0    1.272  !DANGEROUS LOAD-DO NOT USE!
+04.0  100    65.73   3051    3472   63351  11873    100.0    1.254  !DANGEROUS LOAD-DO NOT USE!
+05.0  100    66.36   3079    3535   65383  11921    100.0    1.237  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba     96    63.20   3008    3375   61518  11421    100.0    1.275  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     96    63.20   2857    3045   50241  11703     98.4    1.390

Same goes here, although first guess on this burn is around 62.8

Code:

Cartridge          : 7 mm Rem. Mag.(SAAMI)
Bullet             : .284, 168, Nosler Accubond LR 58623
Useable Case Capaci: 70.870 grain H2O = 4.602 cm³
Cartridge O.A.L. L6: 3.250 inch = 82.55 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : IMR 7828 SSC

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   84    56.52   2632    2585   39245  10653     95.6    1.543
-09.0   85    57.15   2662    2643   40515  10778     96.0    1.520
-08.0   86    57.78   2692    2703   41828  10899     96.5    1.497
-07.0   87    58.40   2721    2763   43185  11016     96.9    1.475
-06.0   88    59.03   2751    2823   44588  11129     97.3    1.453
-05.0   89    59.66   2781    2884   46038  11237     97.7    1.431
-04.0   90    60.29   2810    2946   47537  11341     98.0    1.410
-03.0   91    60.92   2840    3008   49090  11440     98.3    1.389
-02.0   92    61.54   2869    3071   50695  11535     98.6    1.369
-01.0   93    62.17   2899    3134   52356  11624     98.9    1.349  ! Near Maximum !
+00.0   94    62.80   2928    3198   54074  11708     99.1    1.329  ! Near Maximum !
+01.0   95    63.43   2957    3263   55855  11787     99.3    1.309  ! Near Maximum !
+02.0   95    64.06   2987    3327   57699  11861     99.5    1.290  ! Near Maximum !
+03.0   96    64.68   3016    3393   59608  11929     99.6    1.272  ! Near Maximum !
+04.0   97    65.31   3045    3458   61586  11992     99.8    1.253  !DANGEROUS LOAD-DO NOT USE!
+05.0   98    65.94   3074    3524   63634  12049     99.9    1.235  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba     94    62.80   3003    3365   59819  11562    100.0    1.274  ! Near Maximum !
Data for burning rate decreased by 5% relative to nominal value:
-Ba     94    62.80   2839    3006   48744  11670     96.9    1.390

Here's your old standby, a guess would be the 57.6 area.

Code:

Cartridge          : 7 mm Rem. Mag.(SAAMI)
Bullet             : .284, 168, Nosler Accubond LR 58623
Useable Case Capaci: 70.870 grain H2O = 4.602 cm³
Cartridge O.A.L. L6: 3.250 inch = 82.55 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : IMR 4350

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   80    51.84   2591    2504   42330   9398     98.5    1.511
-09.0   81    52.42   2616    2552   43534   9487     98.8    1.491
-08.0   82    52.99   2640    2601   44770   9573     99.0    1.472
-07.0   82    53.57   2665    2649   46037   9656     99.2    1.453
-06.0   83    54.14   2690    2699   47336   9735     99.3    1.434
-05.0   84    54.72   2714    2748   48669   9812     99.5    1.415
-04.0   85    55.30   2739    2798   50037   9886     99.6    1.397
-03.0   86    55.87   2763    2847   51439   9956     99.7    1.380
-02.0   87    56.45   2787    2898   52878  10023     99.8    1.362  ! Near Maximum !
-01.0   88    57.02   2811    2948   54355  10087     99.9    1.345  ! Near Maximum !
+00.0   89    57.60   2835    2998   55870  10148     99.9    1.328  ! Near Maximum !
+01.0   90    58.18   2859    3049   57424  10205    100.0    1.312  ! Near Maximum !
+02.0   90    58.75   2883    3100   59019  10258    100.0    1.296  ! Near Maximum !
+03.0   91    59.33   2906    3151   60656  10309    100.0    1.280  !DANGEROUS LOAD-DO NOT USE!
+04.0   92    59.90   2930    3202   62336  10359    100.0    1.264  !DANGEROUS LOAD-DO NOT USE!
+05.0   93    60.48   2953    3253   64060  10408    100.0    1.249  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba     89    57.60   2886    3107   60334   9967    100.0    1.284  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     89    57.60   2773    2869   51406  10243     99.1    1.379

Wis65x55 · Oct 19, 2015

I would think that RL19 could also be a near perfect choice.
Keith

sask boy · Oct 19, 2015

Hi Keith, I wish I could find some RL19 in these parts but it is very difficult.
I was hoping that someone would have a proven load for the 7 using the 168gr. ABLRs in one of those powders and I could work with that :wink: !

Blessings,
Dan

DrMike · Oct 19, 2015

There are no Alliant powders coming into Canada at the present time. ReLoder 19 is unheard of today.

Wyo7200 · Oct 19, 2015

I use R-22 with a 160gr AccuBond. I have two loads- one in brass cases that has an obt and load developed at 40* (accuracy range from 20*to 60* range) and a load in nickel cases developed at 20* (-10* to 40*). The brass cases are 64.5 gr, the nickel is 65. I only use this rifle for elk hunts, which have been late December with temp swings from -15 to 30*. Both loads chrono at ~3000, and I think the temp creates a spread of 50 fps within the temp range for each load. I can share the ql later tonight. I'd ask what temps do you plan on hunting in? I may have to change those temps- going off of memory and may be off 10* or so.

sask boy · Oct 19, 2015

Wyo7200, I have used the 160ABs for many years in the 7mm mag with great success

. We here in Sakatchewan can get big temperature variances any from plus 20C to minus 20 to 30C. We have a great load worked up for tha above combo. It is 160ABs over 60.0grs. of IMR4350

!.
Thank you for your help.

Blessings,
Dan

Guy Miner · Oct 19, 2015

RL-22 combined with 160 - 175 gr bullets has been an excellent combo for many years.

Accuracy and velocity.

sask boy · Oct 21, 2015

Thanks Guy, I think that I am going to crack into my supply of RL22 as I have 7lbs. of it. I likely will not need all that for my 280AI :mrgreen:!!
I have just 1/2 of the 7mm mag brass cleaned & resized will hopefully have it done by the weekend.
Thanks for everyone's input.

Blessings,
Dan

TXbaldhunter · Oct 23, 2015

I looked back through my notes,I tested 168gr Berger's with 64.5grs of Reloader-22 @ 2986fps.This 7mag has a 24" Douglas barrel.It tends to get a little higher velocity than my 26" Sendero with the same load.