I have used Hi Tek coated bullets from Acme and Missouri Bullet Co., and have been very pleased. I've loaded them in .45 Colt, .44 Mag, .38 Spcl., 45 ACP and 45-70. They are cleaner to handle when loading, keep barrels cleaner (less leading) than uncoated bullets and give you ability to achieve higher velocities without gas checks. Really like the cleaner barrels though. Highly recommended!