It wasn't a factory problem for that model. Perhaps Artistic crafting of a regular stock. Photos would aid to ascertain the appx yr your rifle was made. forty four 22LR, not to the 69A’s .22 S, L, & LR. I assume that this intended the chambering and rifling were created https://highimpactrounds.com/product/winchester-super-x-12ga-2-75in-1oz-6-lead-shot-1290fps-25-rd-bx/