I've been using the same old stuff for years in my .62. I shoot a .610 RB with pillow ticking patch, and 60 Gr. of 3f behind it. It shoots this load just fine. If I were going for buffalo or something of similar size, I'd up the load to 90 Gr., but haven't taken anything larger than whitetails or hogs with it thus far and the 60 gr. has done it's job.
I use a .595 with a thick canvas patch and 85gr. of 2F. in both .62s. It loads easy, recoil is just push, and is accurate at 50yds. My .60 uses the same ball with a thinner patch. I am running low on 2F, but I have plenty of 3F. I may try the 3F.
for years i shot 2f with tack driving results. a few weeks ago i tried 3f with the same results, the top target was shot with my getz barreled jaeger the bottom was shot with my Colerain barreled jaeger and ol ensford 2f, 5 shot groups at 50yds off the bench ,,,,,,,,,,,,
Mine likes a .600" ball and a .012" to .015" patch. The bore's tight and and this load needs a short starter. It's seated over 70 grns or 75 grns of 3F and gives 3-shot groups under 3" at 50 yards. That's as good as I can shoot with anything.