I shoot lead in both my 45 and my 40 and I don’t have problems with barrel leading. Here is why…
Quite a few factors go into shooting lead. Speed of the round, hardness of the lead (measured in Brinell (
http://en.wikipedia.org/wiki/Brinell_scale)), lubrication, among others. Supersonic rounds (lead rounds) tend to melt as they pass down the barrel from both friction against the barrel and the charge sending them down-range. Since most 45ACP rounds are not loaded to pass the 1000fps mark (roughly supersonic) shooting lead is rarely a problem for that caliber. OTOH 40S&W starts out at 1000fps and just gets more aggressive. You can load them slower, but it takes some figuring… 9mm also starts out well past the 1000fps mark and is not a good choice to shoot in lead. Don’t get me wrong, it can be done, I would just prefer not to take that chance.
The idea is to look for rounds that have a high Brinell number and appropriate lubrication. Lead never really gets all that high on the Brinell scale, but try to get the highest you can find. Missouri Bullet typically casts theirs at about 18 for pistol rounds and is a good choice, plus every round comes pre-lubed. Many other manufacturer’s don’t cast them that hard, usually around 14 or just a bit lower. Good for a 44-40 or maybe a slower .38 load, but nothing near the speed of sound. 18 is pretty hard. Missouri Bullet also sells this nifty little leading removal kit on their web site. The kit is cheap and if it works as well as advertised it’s a good solution to most shooters lead fouling problems.
I have found that shooting lead is about half as expensive as shooting plated rounds. Great for target loads and general plinking, but not much else. I also have a pretty good stock of SHTF rounds (even if I don’t believe in the scenario) that are jacketed/plated. The weights are the same as the lead rounds on the 45ACP as is the load, so practicing with the lead serves the same purpose. On my 40, well I occasionally have to go through a box of jacketed rounds at full load just to keep reminding myself what real ammo feels like.
Ron