Re: 7mm WSM and RL-22
I went to Alliant Powders website. They show a max charge of 63 gr of RL22 and a minimum COL of 2.82" with a 160 gr Speer SP at 2936 fps out of a 24" barrel.
May have better luck with a slower powder. RL25 is shown on Alliant's website at a max charge of 70 grains in the 7 WSM for 3090 fps with the same bullet.
As always, reduce from the max charge and work up in your rifle. Have fun!
Hope this helps,
Last edited by outofayr; 03-31-2010 at 02:03 PM.
Reason: added RL25 data