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Old 02-24-2010, 10:35 PM
Scouter Scouter is offline
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Join Date: Jul 2009
Posts: 2
M1S Barrel - MK 220 Cartridge Length
I just got a new M1S upper and started developing a subsonic load.
The first item I check is proper COL using a dummy round with a MK 220 bullet. I'm getting land interference at 2.273". So, 2.260" COL should be OK. Anyone have a recommended COL for the MK 220 in a M1S barrel?
Thanks.
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