HawkI, great answer!
I cast gas check bullets for my full power .357 and .44 mag pistol loads, and for my .257, .30, and .375 caliber rifle loads.
I cast plain base bullets for all of my other pistol loads: 9mm, .38 and .44 spl, lower velocity .44 mag, and .45 acp.
In over 50 years of shooting thousands of these bullets, I've never had any problems of leading in the barrels.