Reloading .45-70 with black powder for an original Trapdoor rifle. The Lee 405 grain hollow base bullet, probably a silly question but do I need to fill up the hole in the base of the bullet? I know you can't have any airspace with black powder but I don't think the hollow base counts as an airspace, or does it?
I was going to use a card over the powder as well.
I made 5 rounds like this:
Lee 459-405-HB, 405 grain hollow base bullet.
1:40 tin:lead
lambfat/beeswax lube.
Circle Fly .460" diameter .062" thick vegetable fiber card.
67 grains Goex 2F by weight.
W-W brass.
CCI 200 Large Rifle Primer.
I only made the 5 rounds then I realized I don't know if the hollow base counts as an air space. I know that there can't be any air gap with black powder, I just don't know how you're supposed to deal with hollow base bullets.