Favorite Powder for 160's in the 280 AI

[longrangehunter]

Hey you guys, what is the favorite flavor for the 160's in your 280 AI's?

 

[SJB358]

I bet JD will be along to tell you R22 has made a lot of high marks for him.

 

[longrangehunter]

In the past that has worked real well. I use 56.0 w/the 160 TSX @ 3.300" and always prints 1/2" groups. Which BTW when I was digging up this stuff I found the targets from Jarrett, and all three of the 175 NPT's were in the .60'-.69" range!

I think I'm being too tough on this gun and expecting better results!?!

 

[SJB358]

In the past that has worked real well. I use 56.0 w/the 160 TSX @ 3.300" and always prints 1/2" groups. Which BTW when I was digging up this stuff I found the targets from Jarrett, and all three of the 175 NPT's were in the .60'-.69" range!

I think I'm being too tough on this gun and expecting better results!?!

Ha! You’re shooting Elk and deer. Don’t be too tough on it. :mrgreen:

 

[JD338]

RL22 is my go to powder in the 280AI for 140-160 gr bullets.
With the 160 gr AB, 60.0 grs RL22 went .092" and 3000 fps.

JD338

 

[longrangehunter]

RL22 is my go to powder in the 280AI for 140-160 gr bullets.
With the 160 gr AB, 60.0 grs RL22 went .092" and 3000 fps.

JD338

Thanks JD,

I'd assume you're using a 26" barrel?

 

[JD338]

My rifle is based off a blue printed M700 action, Tubb recoil lug, Hart #5 24" fluted barrel and pillar bedded in a Remington LSS stock. Scope is a Leupold Mark 4. 4.5_14x40mm with M1 dials.
She is a tack driver with everything I put through her.

JD338

 

[longrangehunter]

I'd say that is very close to my Jarrett Rifle then. I wasn't sure if the 2,950 mark w/a Woodleigh 160 gr. bullet was right at max for my gun with 60.5 grains of RL-22. That bullet is a Flat Base and at the seating depth I'm using sits right below the neck in the case, and why I had to use so much powder to achieve that velocity. I'm going to back it off by a grain though 'cause I don't like to run them that hard.

JD what twist are you using? And what is the proper twist for the 160 AB and LRAB?

 

[SJB358]

I'd say that is very close to my Jarrett Rifle then. I wasn't sure if the 2,950 mark w/a Woodleigh 160 gr. bullet was right at max for my gun with 60.5 grains of RL-22. That bullet is a Flat Base and at the seating depth I'm using sits right below the neck in the case, and why I had to use so much powder to achieve that velocity. I'm going to back it off by a grain though 'cause I don't like to run them that hard.

JD what twist are you using? And what is the proper twist for the 160 AB and LRAB?

I ran the 168 ABLR and 160 AB in my 7 WSM, 7 Rem and the old Mashburn using the 9.5 twist and they worked fine.

 

[JD338]

My twist is 1:9. The 168 gr ABLR went .056" with IMR7828SSC.

JD338