Thought I'd post an update to this.......Like many my M7 in .260 Rem was mediocre at best, minute of deer on a good day. My boy's killed a couple with it, but I couldn't get it under 1.5-2 MOA consistently. It's got a very nice Leupold VX3 2.5x8 on it and overall makes a great little package for stands and carrying.
Broke down and bought an HS Precision stock and it arrived a couple weeks ago. Took it out back with my "best" 120 Nosler load, which with the old stock was a little over 1.5 MOA. Here's the result at 100ys:
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Conditions were pretty good, 62 degrees, 3-5 variable Shots 1+2 showed promise...then shot 3 lead me to the "here we go again" thoughts. Right up until shots 4+5 were touching it for .424"!!
I think that shots 1&2 (clean bore) settled it into the stock.
So I figured it's a fluke. Adjusted the sights and shot 6-8, by now the wind was up a bit, but 3 into .757". By now I had 2 rds left, so I moved to a piece of steel at 220 yards and aimed midway between the bull & edge due to wind:
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So now it's "minute of small deer". The chrono stats were pretty impressive; 2924 MV, ES 18, SD 6.18 As it sits now:
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Might have to find my son a new rifle.....