Re: Powder Choices for SPs
The only first hand experience I have is with a 7mm WSM, have a F-Open rifle with a 31" barrel.
Built an SP using a Stiller action and a 21" barrel, same chamber reamer.
Took it to the range and started with same load as the rifle, RL-25 and 180gr JLK.
That load produced 3080 FPS in the rifle, but only gave me 2675 in the SP.
Went to 4831SC in the SP and was able to work up to 2900FPS, no pressure problem and one finger bolt lift, with the 180JLK in a 21" barrel and with AMAZING accuracy.
Took 5 Antelope with it in Wyoming last year between 500 and 780 yds.
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