I've noticed some bullet nose deformation on my 500gr swaged spitzers once I went to 70gr of Goex Cartridge in my .45-70 long-range loads. 65gr didn't cause the problem, so I'm probably at the very limit of powder compression, measuring about 0.300" with the latest 70gr loads. So, to prevent bullet nose deformation from the seating die, it appears my powder compression should be a separate step from bullet seating.
Montana Precision Swaging has a black powder compression die and stem in .45 caliber, is this what I want? Also, once I compress the powder column with wad on top, then add the bullet and seat it, what does the (smallish, for certain) air bubble I add to the powder column do to the overall combustion picture, or is it simply compressed past the card wad into the powder column too?
Montana Precision Swaging has a black powder compression die and stem in .45 caliber, is this what I want? Also, once I compress the powder column with wad on top, then add the bullet and seat it, what does the (smallish, for certain) air bubble I add to the powder column do to the overall combustion picture, or is it simply compressed past the card wad into the powder column too?
