Most will get you at least 12" of penetration, if they don't expand. If you are worried about it, just use a RN or solid bullet, not a hollow point. Treat it like .32 ACP or .380: "ball" ammo only. Don't overthink it.
Unfortunately, not many places are going to go to the trouble of full on 10% FBI type tests for rimfire ammo. Just not enough demand for that sort of thing to be economically viable. Clear gel can give you some idea of what the bullets will do, but its not as good (or as repeatable) as real 10% jello.
Weird. In my two, they ran great with that mag. In fact, was going to order three more extensions if I kept them. But, now I think about it, both of my Lite Racks had GP triggers and springs. So might have helped or been an improvement over close springs and extended mag setup. I didn’t test them both ways.
Also, I had ordered three bricks each of the 40gr Target and 36gr Mini Mags from CCI last year and ALL six of them gave me fits. The poorest quality 22lr ammo I have shot since the 2008 shortage. Gave me malfunctions in my G44, TX22, Compact TX22, earlier owned Lite Rack, MKIV, SW Compact, and SW Victory. Only thing that those would run in was my M&P AR15-22 and 10/22. When I finally got rid of them, I switched to Aguila SEs for my range ammo.
Professionally Trained Service Dog. Not dogs with issues! LOL unless you are talking about my mutts.
I keep shooting my LCP II 22. I now have 900 rounds of Mini Mags through it with only 3 or 4 light hits. That's almost good enough for carry. This pistol is crazy accurate and easy to shoot.
I saw on another forum the other day that I could get a steel firing pin on EBay to replace the factory titanium one. $25. I ordered one and installed it today. The new pin gives a much more positive strike and better placed on the rim. The factory strike was almost off the edge of the rim. I'll let you decide which brass has the old and new pin installed.
I wish CCI would make a polymer coated Hardcast .22lr for defense.
OSS / CIA / SOG used a special lot of FMJ .22lr that likewise would probably be better for both bone penetration and feeding reliability.
https://forum.cartridgecollectors.or...pistol/24420/7