With an M11 22" Sporter bbl, hacksaw to ~ 16.5", file the muzzle ~ flat, chamfer the bore with an RCBS 'cricket", the case mouth chamfer tool. This gives me a bbl that goes on my Striker and rifle actions legally. On 11/3/17, five 100 yard 5-shot groups from the Striker averaged .860". I've cut maybe a dozen barrels this way, accuracy seems to improve. On an M10 rifle back in June this M11 bbl averaged .808" for 12 100 yard 5-shot groups.
joe b.
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