Hence the need for the compression die. I have never tried it before so I will let you know how it goes. From what I have heard before (and it may or may not be correct), 40 grains should fill the case all the way to the top, leaving no room for the bullet, which is why it then has to be compressed. Once compressed you should just be able to cram a bullet in, it’s doable but extra work. I doubt I will load many like this (hence why I’m only loading 100 for now), but I wanted to see what the original load would feel like and actually do, I plan to chrono these. May not even be possible, I intend to find out.
The compression die, without digging it back out, I believe is just a 45/70 seating die with a steel rod inserted in to it in place of the normal plunger, it’s milled to be exactly .44 caliber, so basically it just needs to be run through that first and then you should be able to seat as normal.
(FYI the die is not permanently modified, it has the original part with it and can be switched back should I ever have to load 45/70)
I am hoping to actually load them in the next few days now that I finally have everything ready, I’ll post my results.