I'm new to reloading. I have a Browning 1886 (Miroku) and a Rolling Block (Pedersoli) both in 45-70.
Bought a box of Cast Performance (Grizzly Cartridge Co) 458/405 gr WLNGC to shoot in the RB after reading several very positive reviews.
Unfortunately, I can't find any reloading data for this particular boolit in any of my manuals. Did I put the cart before the horse?
Are there resources for reloading data for this particular boolit? Not asking anyone to give me any loads, just where I can go to get them.
Can you use standard loading data for cast boolits when shooting them with gas checks or do you have to reduce the load to account for the increased pressure? Is there some kind of formula to apply?
Thanks for your help!