Magazine springs, recoil springs, and mainsprings have a huge affect on the timing of a 22lr.
As recoil springs and mainsprings weaken, slide velocity goes up. That is bad. Since the slide has to push the hammer down, mainspring strength is surprisingly important, considering how little attention they receive. Of course recoil springs are also important.
My M46 pistol, built 1968,
started off being a jam a matic till I firstly replaced the recoil spring. It had taken a set
Both my M46 and M41 became less and less reliable the more rounds down range. I tossed the original M41 mainspring, but kept the Numrich replacement. S&W was out of OEM mainsprings, Numrich claimed factory mainsprings, but based on an examination, what I received, it was obvious someone was clipping springs with a wire cutter. Those Numrich springs were poor quality, inconsistent length, and lost tension quickly.
I was able to purchase from an ebay vendor (S&W was again out!) new OEM mainsprings.
I can tell from the force it takes to cock the hammer, the new OEM mainsprings are stronger than the Numrich, or the old 1988 M41 mainspring. With new OEM mainsprings, both the M46 and M41 are much more reliable in feed and extraction. Rimfire ammunition still has its own problems:
At this range, if you have an alibi, a Range Safety Officer comes over, verifies the malfunction, and takes the alibi round to the Match Director. Who then tosses it in this piece of bottle
as you can see, 22lr cartridges are over represented.
Everybody who shoots a 22lr pistol in 2700 Bullseye Competition has experienced many alibi's with 22lr rounds. Maybe some can be traced to the gun, I believe the vast majority are due to insensitive priming compound, and poor distribution of priming compound in the rim. Having weak ignition, due to weak mainsprings, will not improve the combustion of primer cake in any way.