Glock 20 is bad tough on cast bullets. I like to keep them under 1000. I know i had very bad luck melting bullets in the barrel even with checks. This replacement barrel will only get jacketed bullets and ill save the cast for the 38 and 45I have been reading a lot and plan to cast. I was wondering how bad those hard cast were leading up those glock 20 barrels. I have a Lee tester and plan to do as the first poster indicates and match bhn to velocity. I'm guessing people dont practice with this ammo or love cleaning.
Glock doesn't recommend shooting lead bullets in their barrels because of the rifling.... Might want to look into it before doing it.... Heard it can build up and you can get an over pressure.... I shoot alot of Glocks but have never shot lead bullets in them.... I do shoot Berry's bullets in them ( thousands ) with no problems...I have been reading a lot and plan to cast. I was wondering how bad those hard cast were leading up those glock 20 barrels. I have a Lee tester and plan to do as the first poster indicates and match bhn to velocity. I'm guessing people dont practice with this ammo or love cleaning.
Glock doesn't recommend shooting lead bullets in their barrels because of the rifling.... Might want to look into it before doing it.... Heard it can build up and you can get an over pressure.... I shoot alot of Glocks but have never shot lead bullets in them.... I do shoot Berry's bullets in them ( thousands ) with no problems...
I dont run factory barrels for a couple of reasons lead, and loose chamber being my top two. My storm lake drop ins have zero issues. I dont have a g20 but most of the 10mm hard cast videos I see, people are running factory barrels and i would not do that. Regular #2 works great with no lead issues. I normally chase a session with a mag of jacketed.Glock 20 is bad tough on cast bullets. I like to keep them under 1000. I know i had very bad luck melting bullets in the barrel even with checks. This replacement barrel will only get jacketed bullets and ill save the cast for the 38 and 45
This is the most informative post of the thread . Also a lot of the reason that commercial casters bullets are so hard is they buy a pre mixed alloy that contains too much tin, but reduces the amount of reject bullets they cast.I'll probably piss someone off, but here we go. The term "hardcast" has no definite meaning or hardness value. It is strictly a marketing term used by commercial bullet casters. The simple truth is that 'hard' lead bullets, as in 'harder than woodpecker lips,' resist deformation during shipping and handling better than softer bullets do. Same thing with the hard, waxy lube that commercial casters use - it's used because it stays in the lube grooves, not because it's superior to a softer lube. Most (not all) commercial cast bullets are TOO HARD for about 85% of handgun use. Most commercial cast bullets are as hard as, or harder than, Linotype.
These bullets will not obturate to seal the bore when fired, which causes gas cutting, which causes leading. Same thing if your revolver has any thread choke/constriction. Once the bullet is squeezed down to fit through that constriction, it will not obturate again and you'll get gas cutting and leading.
Bullet alloy needs to be matched to the intended pressure of the load. If your bullets fit your gun and the alloy is matched to the pressure of your load, you won't get any leading except in rare circumstances. Very few applications call for an alloy harder than about 15 on the Brinell hardness scale. Many commercial cast bullets run 21-24; Linotype has a nominal hardness of 22.
This has some good reading on cast and Glocks...T
There is an entire 32-page sticky thread over at the Cast Boolits forum on shooting cast in Glocks. Some folks have success, some don't. http://castboolits.gunloads.com/showthread.php?33855-The-Truth-about-Glocks-and-Cast
I wonder how babbitt would do if empirically tested.