300 B.O. pistol. Which bullet. Which powder. For deer?

I have run Barnes tac-tx 110 and Sierra TMK 125 in my 7.62x39 pistol with great accuracy. I use the Barnes when hunting but have not shot anything with it animal wise

https://www.midwayusa.com/product/1010410999

I would try the 125 grain Nosler Ballistic Tip with whatever powder would push it the fastest.

I like the idea of the 125, I have 300blkout pistol also, but really I think a 115grain will work out better with the powder available, you will get better speed etc.

Know nothing about AR's but 125 gr Nosler Ballistic Tip have been deadly out of a 14 " Thompson Center. Went with a 220 Subsonic Ballistic Tip this rifle season, didn't expand but can't argue with buck going down within 10 yards. Trying a 150 gr Speer Bonded Gold Dot designed for BLK velocities in the Alternative season. Just sighted in with them ,not the best groups ever (1.5 "-2") but good enough for a 1.5 x scope.

I’d suggest trading it for a 6.5 Grendel upper.