Thread: .452 bore vs .455 cast projectiles

Just run them through a sizer you want .453 for a 452 bore
(Rule of thumb 0.001 ovesize)
You will be able to shoot 455 no worries with low pressure trailboss loads
However they may shoot shit and you may lead the crap out of your barrel over size bullets can make for bad leading issues

If you can’t buy a 453 sizer if you were to buy a 223 seating or sizeing die even a stuffed one and get a Engineer to ream the hole to 453
I have a old rusty 311 size die that would work awesome for a a ream job you could have it if you want