When I first opened this thread I thought "man this is old" of course it is still relevant and the question still remains.
I load 158 LSWC with 3.5 bullseye and it shoots great from my model 60. I have considered carrying a similar load simply because I know where it will hit and I am familiar with it. I find I shoot the 158 better than the 148 wadcutters loaded from 2.8-3.5 of bullseye. At contact they are about the same but as distance increases I find the LSWC more accurate. I have debated buying LSWCHP from buffalo bore or one of the major manufacturers or if I should just go with LSWC and call it good.
I carry 135 Speer Gold Dots currently but they are made of unobtanium. I have not seen them in quite a few years.