Glock g20 gen 5 jamming issues

[Thegman]

If nothing else, any .40 FMJ should be able to penetrate enough into a bear to get to the vitals, and it's a situation where reliability is far more important than having the hottest, most perfect load to shoot.

That's my thought. The CCI 180s that are feeding well probably aren't all that far behind the Underwood in round-for-round effectiveness, and way ahead if they run well. If you eventually figure out the problem with the Underwood, great, but personally, I wouldn't sweat carrying the CCI for bear defense if they run well.