strombeckj
Well-Known Member
.223 necked down to .20 is a .223 Practical. 6mmBR has 2 great articles on this, one in an AR the other in a bolt which my smith built. Shooting a .20 cal, 55 gr Berger match varmint is deadly, the BC is .381. Take your favorite .22 cal and neck it down to a .20 cal (BR, 223, 222, 22-250) shoot the same weight bullet in both Cal's and the .20 will hands down outperform…plus they are mild on the barrels. Just my 2 cents worth.