To sum up: go lighter and seat deeper. That's what worked for me in my 20" H-Bar. TAC and/or CFE-223 are your huckleberries too. 50 gr. TSX + CFE-223 is my "default setting" for deer with my 20" AR.

"You can lead a man to logic, but you cannot make him think." Joe Harz
"Always certain, often right." Keith McCafferty