I shoot hardcast bullets with gas checks in my .45 colt, .44mags, .454, and .475 and do not have any problems. They are accurate, penetrate game exceptionally well and clean up is not a problem.
I have had very good results with bullets from http://www.beartoothbullets.com and recommend them highly, another source is http://www.montanabulletworks.com

For complete loaded bullets I recommend Buffalo Bore.
You can get the same velocities and lower pressures with hard cast bullets than with jacketed.