I have made a deal on a Ruger #1 in 458 Win Mag...should arrive in a few days.

I can't seem to locate any data for reduced loads duplicating a 45-70. I think I may need something like this to get started.

Anyone have a link to some data?...or some data to share?

"after the bullet leaves the barrel it doesn't care what headstamp was on the case"
"The 221 Fireball is what the Hornet could have been had it stayed in school"