Powder recommendations

[willtim]

I'm starting loads for my new build. It's 7mm RM with a 24 inch Bartlein 3b 1:8 twist barrel on a trued 700 action. I want to shoot 175 grain bullets (Partitions, Accubonds). What are the best powders for this weight bullet? Thanks

 

[1894C]

Rl26, rl23, h1000, retumbo, 4831sc, n565, n570, imr 7828. Any of those will work some better than others but right now you have to use what you can get.

 

[willtim]

Thanks. Any pet loads?

 

[lancetkenyon]

Since most of the powder recommendations are great, but totally unavailable, try N560 too.

 

[willtim]

I have R22, N165, H4831SC, and IMR 4350. I'm seeing more powders on shelves lately.

 

[1894C]

The rl22 Or 4831sc would be my choice Given what you have already. Pet loads will
Depend highly on your chamber.... I would start the 175 accubonds .030 off the lands with 58.0 of rl22 and work up and look for pressure.

 

[Lefty7mmstw]

I'd go rather slow burning. One of a couple of loads for my kid's Tikka 7rem is a 175 Hornady with a rather full case of Accurate 8700. That powder isn't available anymore but wc 869 is just about the same. Retumbo and rl33 would do well too. With 140-150 grain pills I would (and am) running powders about the burn rate of rl22.

 

[David Emerson]

I am a full case guy. Norma 217, Retumbo, LRT. The 7 likes slow ball powder but the norma and retumbo should work good too. I just got an 8 pound jug of LRT but haven,t had a chance to try it yet.

 

[highdrum]

Imr 8133 works well with heavies in the 7mag. My brothers rifle runs pretty will with 73gr, 180 Bergers, adg brass, 3075fps from a 26" barrel half moa accuracy and es in the teens.

 

[David Emerson]

Imr 8133 works well with heavies in the 7mag. My brothers rifle runs pretty will with 73gr, 180 Bergers, adg brass, 3075fps from a 26" barrel half moa accuracy and es in the teens.

Pretty hard to beat that. Need to buy more powder again?

 

[AZHTR]

I have a Rem 700 7mm Mag that was finished about a year ago. 26" Bartlein barrel shooting 168 VLD Bergers. I originally was shooting H1000, however, due to the lack of availability, I now shoot 70.5 grains of IMR 7977 @ 3025 FPS. Sub MOA out to ~500 yards so far.

 

[willtim]

Thanks everybody. Yesterday I shot five rounds of a 175 Partition behind 62 grains of R22. It was just below MOA at 100 yards. I'll try some other powders...if I can find them.

 

[CoachChris]

IMR 8133 is a good choice for heavy bullets and available

 

[emtyhopper]

I just worked up a load in my rem 700 with a 24" bartlein #3 contour. It likes berger's max charge of RL26 and 175 gr berger elite hunter.
I got an average velocity of 2829 and an SD of 9fps.