I just got a brand new Marlin 1894, and have it sighted in with Magtech 240 grain semi-jacketed softpoints. I was wondering about using some of my loads for my model 629. These are loaded with 8 grains of unique, 240 grain lead semi-wadcutters, which run around 930fps out of my 6" S&W. Would these make good loads for my new marlin? Would leading be a major issue? And how many rounds does it usually take with lead semi-wadcutters before a major barrel cleaning? Thanks for any advice.