In my Colt Gold Cup, I get 1400fps with 200grain SWC's using more AA#9 than I care to publish. But the same load does 1480fps in my Ruger Buckeye, and a bit over 1500fps in my early model Smith and Wesson 610. So I am pushing into the velocity range where gas checks are more important. I am using hard-lube now (I just put a heater on the Lubrisizer), but this load is hot enough to vaporize some lead and cause it to condense in the bore.
If only I shot .44: I could buy 1,000 gas checks any day of the week.