built a 20 BR a few yrs ago...9T/3G...Pac-Nor...
wanted to use 55 Bergers...all they did was punch a hole through
p/dogs...30 grs down a 20 cal pipe...over bore...20-250 ?
wasting your time & $$....until Hornady builds a 50 gr V max 20
caliber..I'll stick with the 40s...an 11T is about ideal for them..
I shoot three 20 cals...20VT..20PT and my rechambered 20BR...
which is now a 20-222...the VT & PT are 12T...which do work great
with the 40 V max...the 20's are where its at in the p/dog
business...flat as a laser....devastating explosive hits...with the
right bullet...the 20-222 is about as good as it gets......