Well, I shoot a Harrington/Richardson Ultra rifle, they all come from the same factory so I reckon their all the same anyhow. Mines in .243 caliber and for me, has shot wonderful. At first I was using core lokts with some pretty crappy shooting. They would up averaging around 4-6 inch groups. One day I wound up buying some 13$ winchester powerpoints, and amazingly enough, they shot into a 1inch group no problem. Kinda strange the cheapest ammo would work, but for me it shoots pretty well, especially when considering the price.