Re: .30-378 Weatherby Shooter
30-378 weatherby is the best velocity of the 30 cals .
Its all case capacity period to get velocity then bbl legth.
Load the slowest powder in a drop tube to get max pressure .
Simple burn rate chart and lean to VV 500 powders if you can , IMR is temp sensitive , etc .
4350 fps from a 150gr bullet .
4100 fps 165 gr bullet
3950 fls for a 185 gr bullet
It can be done , drop tube , Fed 215M
Case neck inside and out , length. I had some nickel dipped to help life at a metal guy in town .