It is known that lighter bullets in 22WMR can cause issues in semi-auto pistols. My Kel-Tec PMR is the same way. It does not like any 36 grain or lighter ammo. It does great with 40 grain CCI Maxi Mags. And if the RIA XT22 is anything like the PRM 30, it will not like slower ammo like the Speer Gold Dot that runs at 1050 FPS. Use the hot stuff running around 1800 FPS like the CCI Maxi Mags.
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