I have to confess. I’ve struggled reloading 45/70 for years. I had so much difficulty getting the loaded rounds to chamber in my 1886 and occasionally my Marlins. I’ve tried painting them with markers to find the issue, ran a strong light over them to look for ripples in the wall, etc. Well, I ran through 50 flawless rounds out of my 1886 today. I’ll tell you my secret.....I ditched the Hornady Expander Die and used my late fathers RCBS expander die. The RCBS will expand the entire neck and not just flare the brass like the Hornady die did. The RCBS sizer die also didn’t size down the brass as much as the Hornady brass did. I was able to seat the bullet with finger pressure most of the way and use the Hornady seating die to finish it off. Run it through the Redding crimp die as I always do and perfect function! I hope this helps anyone else who has silently struggled with the 45/70. As an aside, I also played with a Lyman M die and had similar success as with the RCBS expander die.