I have some 45LC Speer capsules on order, want to try them in my 1858 Rem. with R&D cylinder. I was using 7gr. of Win. 231, under 250 gr. bullet, est.900 fps.,a little to much. Did some reading about Trail Boss, like it better, using 5.5-6gr. grains under 200gr. bullet=approx. 800 fps. But I'm...