Brush out your chambers
Try brushing out your chambers to get the soot and gunk out.
Then try some standard 22 lr or hi-velocity.
My thougt on the matter is that the lower powered rounds do not have enough pressure to obturate the case so powder gas and residue tends to leak back along your case wall upon firing.
Standard pressure loads will treat you better.
I used to shoot a lot of 22 shorts in a handgun, they got sticky to extract or load while 22 lr didn't bother.