doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com Thin barrels passing London proof

That Eiffel Tower profile was named hundreds of years ago .........."swamped". Some "schools" of muzzleloading longrifle barrels were struck that way over here 250 years go. It not only strengthens the muzzle area against dings but it also helps the handling characteristics. And, on a KY/PA longrifle which may have a barrel well over 40" long, it is beautiful. IMMostHO.

SRH

toby: based upon my observations, it seems reasonable to state that typical english made field guns would have thinner barrel walls than typical american made field guns...and, the sin of barrel honing has only recently begun to be practiced in this country...

Gee, that's very interesting Ed. Thanks for offering even more proof that you don't know what the hell you're talking about. You ought to stick to things you are good at... like torch coloring guns, Trolling, and posting anti-2nd Amendment drivel.

Recall the sad story Ballistix999 told us about the 20 gauge Clarke he restored and which passed proof. After 6 rounds, the left barrel split. Fortunately no one was hurt, but that was that.
http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=237716&page=1

I'm guessing the "repaired" bulge might have had something to do with that failure.

Anyone know where the bulge/crack was located? Near the chamber? Near the muzzle?

It was just in front of the chamber area. About where the forcing cone would transition to barrel bore. On page three of the original thread.

This might be controversial, but I don't mind even 17-18 thou in a 12-gauge that is otherwise in very good condition. With proper low-pressure loads I would shoot it with confidence. On sub-gauge guns I take a markedly-different tack. Sub-gauge guns (especially 20s and smaller) seem to operate at much higher pressures and I'd want a minimum of probably 25-thousands (and would prefer 30).

Remember "Low Pressure" loads are of benefit "ONLY" for lowering the pressure in the chamber area, no farther than about 4" from the breechface. "IF" the same shot load is propelled to the same velocity, then the pressures forward of that will actually be Higher with the low pressure load. If the MWT is down the barrel
where it should be one is not doing it a favor my shooting Low Pressure loads unless that low pressure is obtained by the use of a lighter shot charge &/or a lower velocity, which can still use a fast burning powder. Slow powders will slightly raise the pressures beyond that approximate 4" mark.

Would everyone who feels comfortable shooting guns with barrel�s MWT at 17-18 thou let their kids or grandkids shoot it? The gun might be in proof, but.....