Had my first outing with a "new to me" 22/45 MKIV today and had some less than stellar results.
1) With a full 10rd mag, it would occasionally send the first round to the top of the chamber and wedge in place. Is there normally a small ledge between the feedramp and the chamber? Looks problematic to me, but thought I'd ask before messing with it.
Tried to sling shot. Tried to use the bolt catch. Problem occured both ways.
2) This same malfunction would sometimes occur a few rounds into the magazine
Tried a variety of ammo. Blazer. Aguila. CCI Standard velocity, Federal and minimags. Copper jacket and lead. Round nose and FMJ.
Some were worse than others, but none perfect.
I could not attribute it to one ammo type or magazine (had 4 to use)
Is it normal that the top bullet can wiggle up and down in the magazine? I know with center-fire cartridges this can absolutely cause such feed issues. Not sure if rimfire is different.
3) The gun would also only occasionally lock back when empty. Even with the high velocity stuff.
Is the bolt catch finicky or do you think I'm getting a short stoke? It's doing this even with the 1200+ fps stuff, so if short stroke, there's got to be something going on with the action.