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    Gunsmithing 7mm RSUM Barrel Burn out 570 Rounds

    A friend of mine burned his 7 mm RSUM barrel out in 570 rounds the bore scoped photos look like a 6.5 x 284 barrel after 1000 rounds, stress cracking etc. He is thinking about a coating. Salt-bath nitrocarburizing by Melonite, nitride coating or it has been suggested by several metallurgists...