With regard to the 45-60 and Herco load...my brother who knows far far more than I could ever hope to glean about reloading, advised me against shooting the 45-60 with tt pressed down on the powder. The space in the case above powder is apparently very bad. So I pulled the bullets, re-expanded the necks, put into each case a 5/8" length of 1/2" cylindrical styrafoam insulation (.5 gr. weight) to fill the case with a bit of compression of the foam, and then reseated the bullets. I still have not shot them, but I'll let you know how it goes.
Regarding Herco in .45 Colt ... terrible!! I set up my brand new Chrony F1, and the very first round (200 gr. lead bullet, 9.5 gr. Herco) was another blooper. the bullet hit the front of my Chrony, but did not kill it...it is the master edition, and the LED screen was beside me on the bench. Still, I did not trust to fire another at the Chrony, so I fired some off just to see if I would get repeat bloopers. Some went off with a satisfying crack, and others were pathetic. Now, 9.5 gr. Herco is about 1/4" short of a full case with the 200 gr. bullet. I wish I knew what was happening here. i'm not holding much hope out for the rifle loads.