I have used them on racoon in traps and up close would not penetrate and kill humanely without them squealing even louder until i got the pellet rifle out. My nephew destroyed his Marlin 22 shoot them CCI quiet ammo as they got stuck in the barrel and he didn't know. Bulge the barrel with 5 rounds jammed up .
Well Phish ..sorry for your results but here is
MY basis of reliability ..we have been covered up by raccoons for 4 or 5 years.. to the point we even quit our bird feeders several years ago to hopefully not have to take action against the critters ..I started with a live trap and would haul a raccoon to the nearby state park
every morning ..then we started running into them in the day time on porches and crap everywhere) ..in the flower beds (digging) and garden etc ..I was catching(live trap) raccoons so big I could not carry the cage ..there was hair and raccoon sticking out of the live trap mesh everywhere and no this was a big trap!
The heck with this I say.. bought and set 6 (six) dog proof traps and baited them with cheap dry cat food ..next morning six for six !!!..next morning four for six ...next morning three for six ...the next week or ten days one or more!
We and our grand kids can now safely venture out on to our porches and yard of an evening (terrible fear of a rabbid raccoon nailing one of the kids)
The system of dispatch was real simple.. I raised my second floor bedroom window ..took the screen out..took a knee using the window sill for a rest ..took my Remington clip fed bolt action .22 rifle and depending on which way they were turned shot them in the ear or eye stone cold butt dead..no noise to speak of from either participants ..end of discussion for me but others may very well have various and different outcomes such as you had.
I am sorry about your kinfolk but I've got to believe his barrel must have been fouled in some manner(like spider eggs, gun case stuffing etc) prior to him introducing the CCI Quiet to his .22 ..I cannot comment on the stacking 5 in the barrel as I was not there to understand the external conditions that would lead to that many in one barrel
The Quiets are hard to find so if you by chance have a quantity you wish to get rid of please PM me ..I would love to have them!
Be safe and healthy to all
Bear