Mine was built for me two years ago,
before the BTDT stocks were out. If I was doing it over again, I'd have bought the stock kit here. You save a shit load of time, save some money (as it has everything but the barreled action) and these stocks have providence. A bargain for those building a mk13 mod0 or a 700/300 (if they just use a m24 scope rail instead of the McCann).
edit:
to expand on what Chad said, here is a pic of some of my handloads and some mk248 mod1, shot in my A191 chamber (m248 mod0). The 10 of the left were Mod1. The two rows with red are a 230gr Berger OTM load at 2780 and the ones on the right are a test with Sierra 210 SMKs at roughly 2810fps.
I shot these all at 1k on an IPSC. The 210 and 230s made a nice round ~10" group . I then loaded of the mod1s, made no corrections and shot 6 rounds. Every one of these was 9" higher than the group average and that ammo held 1" of elevation at 1k fir 6 shots. Group was ~ 7" wide, waterline. I was ticked shitless until I looked at the brass. Junk. Every one of them flowed into the ejector and had a slight crater. For a fire and forget case, no big deal but I would have to tweak my chamber and throat to get the pressure down.
something else to consider. Carl Kovalchik still holds the 1k Prone Any Rifle record with a 300wm shooting 220gr SMKs. Old 90s profile. This record has stood since 1996.
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