I use a LEE 500gr mould for the 90,
mine drops at 475gr as it came to me from some idiot who had tapped the top of the ali mould with a hammer to get the bullets out,
filed it down, lost a bit of weight but shoots great sized and lubed to .459,
for my 70 I use LEE 400gr & 340gr flat noses, so I can use in Sharps and Winchesters,
sized and lubed to .458, but going to try .459,
makes life easier,
people call the Lee stuff, but for the £s they are spot on,
I use range scrap with some pure lead mixed in as I find it to hard on its own,
guesstimit, has seen me fine for years,
have fun with your new toy,
I get older the toys get bigger,
T