Hi all
I have a h&r trapdoor 1873 little big horn model in 45/70
I am wanting to use cast 500 grain projectiles and 2207. Powder
I've been using 2207 with 405 grainers at 29 .7 grains but wish to use the 500 grainers
I K ow loads are available for black powder but really want to use smokeless
Powders o. Hand are
2205
2207
Lovex do36
Pl Ease help and Thank you