Cleanest .22LR ammo

The federal bulk 22lr constantly jam in my sig mosquito. Recently switched to remington thunderbolts ($19 +- for 500) and have had no failures with the first two bricks ;)
 
The problem I'm having with the Taurus Tracker after firing 60 or so rounds is a few cartridges start to back out of the cylinder chambers after one or two are fired, causing the action to bind. When the cylinder chambers are clean, this doesn't happen, only when they begin fouling.

Since that's the reverse of what happens with a lot of revolvers where the ammo becomes harder to extract after the chamber is fouled, I can only suggest that it's not caused by dirty chambers but by the cylinder heating up and slightly expanding.

I think that you should find an ammo that's a little bit snug with a clean chamber so that it will still be held by a friction fit after the cylinder heats up.
I think that Aguila's do have a slightly thicker case and may be worth a try.
Plus they are clean shooting despite their funky smell. :)
 
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