Reply with quote #9
puddlejumper: I'll second the above suggestion about carbon fouling: when, not if, it builds-up, accuracy will go into the toilet. I've looked inside several bores, including my Hart, with my "Hawkeye", when accuracy deteriorated, and in every example, when the carbon was cleaned out, groups shrank-- a lot. This ctg. seems to build-up with carbon much worse than my 222s', 223s', 22BR, etc. Benchmark with the 32 gr. Sierra BK, .030" of jump is working for me. 5 shot groups average almost 1/2 moa. At a documented 585 rds. fired, am already seeing some serious firecracking on the tops of the lands, directly in front of the chamber. I'll be lucky if it lasts 1200/1300 rds.
Reply with quote #10
Best carbon remover I have used is the new Hoppes Elite Gun Cleaner. Brush with this in what you thought was a clean bore and the first patch will come out looking like a lump of coal. Won`t touch copper though. Butchs Bore Shine or Sweets for copper fouling. The sub-calibers foul fast in rough factory bores.
Took a good look at my Win .204 case necks. The neck walls on one measured .009 by .013. You can eyeball the difference. Have resisted outside neck turning up to now. I think it weakens neck walls but have just ordered a Sinclair neck turning kit.