Hey folks. Well, I have the 10/22 built and fine scope on it. At 50 yards, it ain't no problem to get sub 1/2 inch groups. But when I stretch it out to 300, hard to keep it inside five inches on a calm day! I also have a CZ 455 that will shoot MOA at 300, but I believe this 10/22 will do that or maybe better....with the right ammo. You know to "handload" a .22 rimfire, you try as many brands, bullet weights, velocities, etc. as your checkbook and time will allow. Best that I tried at 50 is rather expensive; the Wolf Match Extra. I only have about 14 rounds left and will find a quiet day to try them at 300. Tried my sub-sonic Fiocchi and Normas, and may re-visit them again. Tried Reminton/Eley Club, Eley Standard, and some others with not much success. Which brings me to the question for you: please share your successes using your 10/22 at 300. I'd like to know what ammo you found worked for you and how they grouped. Be honest about the group sizes,ok? Also, describe your setup,please.