If you are interested in a high-end.22 I suggest you send it to either the Eley testing center in Texas or the Lapua testing center in Mesa, AZ. I shoot a CZ 455 with a Lilja barrel, and I took it to the Lapua center in Mesa because I'm already in town. For $50 they will test as many lots of whichever of the Lapua ammo you want to test in your gun. They have a machined fixture that is attached to an engineered block of concrete. They attach your action and barrel to the fixture and shoot down a 100m long tube with electronic sensors at 50m and 100m. they shoot groups until they identify a few that have good performance with 10 round group, and then they shoot 30 rounds with those lots. You will find that different lots of ammo will like your gun better or not at all. Once you find the ammo your gun likes they will sell it to you at a very nice price. The only catch is that they only sell by the case (5,000 rounds.) It was totally worth it for me because I didn't have to go out and buy 10 or 15 types of ammo to see if my gun liked something and then hunt down that lot. One trip for an hour and I had all the ammo that gun is ever going to shoot.