I have two .41/97s, one 4.25" round butt and one 5.5" square butt....both are excellent shooters.
Only thing you have to watch is the length of the bullet from the crimping groove to the nose. The 97 has a short cylinder and the standard Keith and long nose LBT will not fit... The Keith can be crimped over the forward driving band and the WFN LBT work just fine...
Bob