It is more likely to be 'right on' when you use 124gr. I've been using 115gr FMJs at 21' and consistently am low or low/left, mainly due to trigger squeez or pull issue. Just lack of pratice. At the prices for ammo, no matter FMJ 115gr. 50 round box, HP is the same price for 20. So, I 'might' try one mag of HP just for the education but ammo goes quickly at the range. Kinda like gas, the faster you drive the quicker you have to refill.