Accuracy from the Savage A22mag with other ammo?

Anybody have any luck getting decent accuracy from one? I bought one new and it was absolutely horrible in the stock plastic stock shooting 3-4 inch groups at 50yds. Put it in a Boyds pro-varmint and glass bedded it in there and it has improved a bunch but now the quest is to find good shooting 22 mag ammo to see if I can improve it enough to shoot it in out local club rimfire varmint match. Needing 3/4 to 1 inch accuracy at 100yds. I can get that with the CCI A22 ammo but not in 5 shots, more like 10 or so. We get 5 shots per target and depending on the paper "critter" it's either a 3/4 inch dot or a 1 inch dot.