Powders for 180 Bergers in 7WSM

[dennisinaz]

Anyone shooting 180 Bergers or JLKs in a 7WSM? What powders are you using, what velocity are you achieving. I have been using Ramshot magnum as it is the slowest stuff I have. Trying to decide which other slow powder to buy.
Thx

 

[wc872]

With 180's either Berger or JLK's Retumbo, H1000, RL25 & RL22 have all given me good results. I decided to try 168 Berger's & H100V gave me good enough results to win high score in a 1,000 yard Match last year.

 

[dmg264]

Good results out of RL 25, Magpro, and IMR 7828ssc.
I got higher velocities out of the RL 25 and Magpro (2920-2940 fps). Best accuracy was with 7828ssc running around 2875 fps. This is out of a 25" 8.5 twist barrel.

 

[dennisinaz]

I have mostly tried Ramshot magnum and am getting up to 2920 or so with 26" barrel. I tried R22 and got terrible accuracy and only 2750 fps. Haven't tried any of the other powders. May need to look at my brass or loading technique as EVERY 3-shot group has 2 bullets touching or nearly touching and the 3rd one out about 1/2 MOA. It is frustrating as heck!

 

[nddodd]

Im shooting 180 jlk's with 66.2 gr of h-1000 and fed 215 match primers. It's getting right at 3000 fps out of 28" barrel and getting 1/4 moa at 250 yds.


Hope this helps,
Nathan

 

[bwaites]

180 Jlk's and 64 grains of H1000 gives me 2950 from a 26" Hart barrel, which seems to be the sweet spot for my rifle and accuracy. I've tried RL 17, (great velocity, lousy accuracy), RL25 (slower velocity, not quite as accurate as the H1000). RL22, (slightly better velocity, worse accuracy than RL25). I've also shot 4831 SC, which gives good velocity but doesn't like the temp swings where I live.

The 4831SC gives me best accuracy with 168 Bergers.

Bill