Thread: JW 15, or any 22 LR accuracy - group size

Originally Posted by smidey

Mine is an over barrel suppressed job and it always groups very well except for once recently. It grouped about 3" so I gave it a clean and was back to tight groups again. I have always used Winchester 40 or 42gr subs. I have recently had a few 40gr subs sonic boom and a fair amount of bullet cases have a glue or similar substance on them which makes them hard to remove

Sent from my workbench

I had that issue with the Winchester Power points, looked like some sort of wax on them, gave up with them after having to pop every second one out with a screwdriver.