I just got my new Bushmaster M4/A3 in last week, I took some time and decided to start using Remington 55 grain UMC rounds. I put 60 rounds through the my M4 and the range a couple of days ago and noticed a little residue and bullet residue in the barrel and as well as on the bolt and firing pin, seems they burn a little dirty but overall was somewhat satisfied with the round, its cheep and cheep again, its either Remington UMC or Wolf in my price range and I rather stick with Remington after the things I’ve herd about Wolf ammo, should I stick with Remington UMC for long-term use and will this bullet treat my gun right down the road and keep the chrome lined barrel healthy? The ups and downs please