Re: 20gr. aguila .22lr ammo??
They don't have powder in them, just a primer as someone else said.
I get ~ 2.5" groups from mine at 25yd from a Marlin 25N which is normally a 1 holer at 25yd. From my Ceiner AR15 conversion they do around 3.5" for a setup that's usually about 1/2".
They have plenty of accuracy to kill squirrels, racoons, rats, etc. inside of 25yd. They go about 700fps from my Marlin rifle and are exceptionally quiet even without a suppressor. Suppressed they're fantastic, complete noise abatement.
Test to see if they exit your rifle barrel, some barrels don't work with them, they're designed to run from pistols. The Marlin and AR work but my Win 63 and 10/22 don't reliably spit them out. I don't want to hammer stuck lead out of the barrels so I don't shoot them anymore from them.