A few years ago I got a "steal of a deal" on an Underwood 30 M1 Carbine, re-imported by Arlington Ordnance. It had new wood on it, but the recoil plate was apparently poorly fitted as there was a gap between it and the receiver when assembled. I shot it a little, was unimpressed with the accuracy, found a cheap GI stock at a gun show (with the recoil plate attached), swapped stocks, was still unimpressed. I read all the "accurizing" tips for the M1 Carbine, epoxy bedded the recoil plate in the GI stock and managed to get some "hang." Took some Remington factory loads and some CB loads to the range and shot three 5-shot groups with each at 50 yards. The factory loads averaged 3.18", the CB load averaged 3.37".
Finally got around to slugging the barrel. I used .320" pure lead round balls. The one driven all the way through measured .3097". One tapped in flush with the muzzle and tapped back out measured .313", one driven about 1/2" down from the muzzle measured .3102".
Well it's gonna be tough to get much in the way of accuracy from that! I realize the M1 Carbine is no target rifle, but a lot of folks get much better accuracy than this from theirs. This one does have the bayonet front band.
Well, a Criterion barrel runs about $321, when they're in stock. Fitting and headspaceing another who knows how much. I understand Carbines were known to be counterbored by the arsenals if found with wallowed out muzzles. Don't know what my best options are here. Thoughts?
Glenn