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Posted: 11/10/2009 7:53:01 AM EDT
I have an Upper which has a M4 contour chrome lined barrel (Bushmaster) and use open sights or an Eotech and had never paid much attn to it because I know chrome lined barrels can't shoot. I had decided to replace this barrel with something along the lines of the Predator Pursuit or Coyote Carbine as they shoot well and aren't overly heavy. I wanted to know how this Upper actually shot so I could see the improvement in accuracy with the new barrel. I put a scope on this upper and used a lower with a RRA 2 stage match trigger (BTW this upper has a free float rail) and used 55 grain Win fmj and 55 grain Hornady V Max (all Winchester brass) tried W748 and AA2230 with both. Every thing stays just under an inch at 100yards and as far as swapping barrels I think I will leave well enough alone. I was somewhat suprised. Just out of curiosity what kind of groups are you guys getting with your chromelined barrels ?
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