"I haven't really looked at these due to the frame cutting issue. Could you just down load it to 38/357 levels and avoid the problem?"
I'm assuming you are discussing the "top strap flame cutting" that caused Bill to discontinue the gun?
Apparently,, it came from folks trying to hot-rod the gun by using light bullets & a fast burning powder. HOWEVER,, time & many years of actual use has shown that the SLIGHT top strap flame cutting either barely shows up,, or even if it does appear, it only goes a little way & stops. AND,, it has been found in other makers & models of guns.
Using a heavier bullet, slower burning powders have proven the caliber & gun to be excellent. It was designed around that concept. Heavy bullets to knock down steel rams in silhouette competition.
David Bradshaw was in on the early testing & development of that gun & caliber. A few years ago,, he ALSO helped design a cast bullet just for the Maxi's. I have (2) molds & can attest to the accuracy of that combo.