The 20 grn rounds were designed for a bit larger game and better penitration. They originally just had 17 grn hollow points and V-max bullets from 4 manufactures, but really only two different bullets, one a hornady and the other a CCI TNT. The other two companies just put their name on it.

Then 17 owners started showing an interest in a heavier better penitrating bullet for large ground hog, fox and small coyotes. So the ammo makers stepped up and gave us what we wanted. A 20 grn XTP controled expansion bullet. I haven't used them, but many on Rimfirecentral have and seem to like them on slightly larger critters where you would want more penitration instead of voilent expansion.

Velocities are still pretty good as well.

Paul