Brian,
When the 44 Deerslayer (later Deerstalker) came out,Dean Grenell of Gunsport Magazine (no longer in business) did a nice article about loads for it.

He did comment that lead bullets tended to clog up the gas port mechanism and suggested jacket bullets.

Back then,jacketed bullets were not really that common.

I often wondered why that later on,sales of the 44 Ruger carbine did not do well.

Wayne