I was thinking of loading some 9mm lead bullets, but I was wondering if 9mm loads are too fast for lead. Do they create leading problems?
Sounds like your bullets were too soft,pure lead bullets are great for muzzle loaders but will cause excessive leading in modern firearmsI tried this once in a S&W 5906. After a few rounds lead started building up on the feed ramp causing FTF problems. Maybe it was just that particular gun, but I've stuck to jacketed since.
You want hard cast, and not swaged.I shoot lead all the time in my 9mm. The general rule of thumb (read somewhere, can't quote the source) is that leading is not an issue until you start going above 1100+ fps. I do know that I shoot cast bullets in my levergun rifles all the time, at speeds of 1350-1800 fps and have never had any leading problems. As one poster said, you can buy the appropriate lead bullet (with the right hardness, tin content, etc.) for 9mm speeds that will not lead-up at all -- just don't use pure, soft lead.