CCI is good, but for top drawer accuracy, it's Eley. Eley isn't cheap and it can be confusing as the seem to make 20 different types, but when precision is the goal, it's the best I've found.Most M41's love the CCI Standard Velocity 40 grain ammo - but it is quite possible there are a few out there that don't. Try some and see.
I also find that the CCI is the most accurate, highest quality Rimfire .22 and has the least amount of failures to ignite.
CCI is good, but for top drawer accuracy, it's Eley. Eley isn't cheap and it can be confusing as the seem to make 20 different types, but when precision is the goal, it's the best I've found.
Is the Model 41 typically that "fussy" about ammo? Maybe I am better off sticking with the more tolerant, less expensive target pistols.