Originally Posted By: hm1996 My main concern on any barrel is accuracy and #2 concern is ease of cleaning. Since I don't have a borescope, I'll just have to rely on the old "clean patch" method, realizing of course that there may be some copper lurking in my barrel.
If it shoots, I can put up with a bit of extra effort come cleaning time. My pet hunting rifle is a Savage .338 WM that shoots consistent 5/8" 5 shot groups @ 100 yds w/most bullets I've tried, yet is a real bear to get the "clean patch" even after firing only one round. It edged out a model 70 .300 WM that cleans like a breeze but won't shoot under 1 3/4" 100 yard groups.
I've shot out a number of premium barrels over 15 years of NRA XTC competitive shooting and most clean easily, all shot better than I can hold w/iron sights from field positions. I usually expect to get 6500 to 7500 rounds out of a barrel. I'm sure a borescope would have revealed some copper in those barrels, especially toward the end of their serviceable life, but some things are just best unknown
.
Regards,
hm
If you change your mind try WipeOut/PatchOut.
I had not shot my M700 in -06 for a couple of years until I ran it out over the weekend to putz around with some new powders. I had however, run a Hoppes soaked patch followed by dry and then a bit of oil through it every 6 months or so. Always came out clean.
Ran about 20 rounds through it Saturday. Came home, did the Hoppes brush/patch routine until clean (about a half dozen passes). I then ran a patchworm with WipeOut and let it soak for 10 minutes. The next patch came out royal blue. I ran another wet patch though and let it soak over night. Sunday morning I ran another wet patch that came out even darker.
A couple of wet/dry combos later, it was coming out clean. My bet is some of that copper had been in there since 1963.