OK, back with what I found. I did the Buffalo Classic first. It's an older one That's stamped Wesson and Harrington. I made up some dummy rounds and kept bumping them out with the bullet puller until I got some rifling marks when chambering them, then backed off about .020. For the 500 gr. o/all length was 2.770 with one driving band exposed. This is much longer than the specs say. (2.540). With the 405gr it was 2.550 o/all. The 340gr. was 2.585 o/all. Think I'm on the right track?
This rifle was very accurate @ 100 yd. with jacketed and smokeless, even with all that free bore. It had a scope on it and I took it off and put on a peep sight with a tunnel front. Another question... the Lee 500 gr mold I have is for a gas check. Is it ok to load these without the check? Will that shoulder on the back hurt anything? I'm ordering a new one with a flat base next month.
Working out some pan lube now and hope to give these a try this coming weekend. Haven't picked up any black yet, but will load up some light trapdoor loads with smokeless. Thanks for all the help.