Interesting situation! The comment about match ammo made me wonder if, being manufactured in Germany, the chamber tolerance is just a tad tighter than some of the others--Back in the day, my Mossberg, Remington and CZ .22's all shot whatever I fed them without a quiver, but possibly this Anschultz was chambered specifically for a common European .22 round. Hard to say, but I'm hoping that if the chamber is this exact, it may also have a very good barrel and may end up being a real tack driver which would be great cause .22's are fun along with being a very efficient small pest eliminator. ---------John