tomiswho
Thanks. I thought I'd make a record in case it didn't work out as expected!
Three44s
........ knowing that they can't "freeze" you out on brass helps .......
My sentiments exactly.
Here's the rest of the report:
I dug around and read some more info on-line, mainly about primers and how to cope with the deeper primer pocket of the 45-70 (rifle) brass. It seems folks just use pistol primers and I couldn't find where the case head was "shaved" so I loaded some rounds and gave it a go. I got the loading data for this test from the Hodgdon site as I was using 355grain cast bullets and my books lacked info on cast bullets.
I should add/state that the loads I used were full power loads using Winchester 296. The converted brass extracted easily, no sticking. I didn't shoot these over a chronograph but from the recoil I'd say they didn't suffer any loss of power due to the little extra case volume these 45-70 convert cases offer.
I made 5 more cases this morning, it only took a few minutes as I used the lathe to cut the cases to nearly trim length.
All-in-all this adventure was fun and offered a few unexpected concerns, brass volume and primer pocket depth, but I still have all my fingers so it appears I'm no worse for the experience. I am pleased to know I can easily make brass for my 480 Ruger from 45-70 Govt brass (W-W is the only brand I tried). I don't anticipate a shortage of 480 Ruger brass but I like to have an option open to me as I like the 480 Super Redhawk.