You didn't mention the type of rifle you have but from a previous post it looks like its a late model Win 1886 EL? I have slugged a couple of Miroku made 45/70 barrels, one was a Browning 1886 and the other was a Win 1886 EL. Even though production was 10+ years apart, they were identical at 0.457. Most of the posters will probably be assuming you are using a Marlin and these are usually larger, eg mine measures .4585. The Miroku bbls also have deeper rifling compared to Marlins.Would appreciate some suggestions for a gas checked cast bullet in the 300-350 grain range for deer sized critters. I have a large amount of Lyman #2 just sitting around.
Also, what do you size the bullets at?
I have a Winchester 86 Carbine, I get really good results with the RCBS 405 gc mould. They drop out at .458 and weigh 420 grains with the lube and gas check on.Yes, the rifle is a 1886 EL, sort of the reason I posted this thread in the Winchester section So I am hoping everyone who responds is referencing their experiences with the 1886. The chamber and throat can handle most anything as the very first thing I did was to have a gunsmith cut the throat .200 longer.