Sorry to interrupt here but need to say something here. I, too have a '76 and it is in 45-75. I debated for a few minutes about the calibers but settled on the 45-75 and am completely satisfied. I, too, started out with 348 cases and slowly converted to other makes. I got burnt with Bertram brass, not with the quality but the price--so stay away from them for that reason. I went to Jamison and so far have no complaints. I had a relative who had a vintage '76 in 45-60 and I made lots of ammo for him with 45-70 cases. I did sort of a Sneaky Pete on them as all I did was run them though my 45-75 trim die and cut them off to length as the cases lengths are pretty near the same. Besides 45-70 brass is--so far--pretty darn cheap to buy. Anyway, then all I did was expand the case mouths, put in the load and bullet, crimp and he was in business all with 45-75 dies. So--I guess--as far as easy to load, that 45-60 is a pretty good one. Thats all I got to say other than I do like my 45-75 alot.