222: just for the hay of it I would drop in another barrel. The RIA pistols are mil-spec and a $35-45 military barrel from any of the larger or major supply houses should cure the problem (check the graybeard links page). I would get one and drop it in and see what happens.
If your failures to chamber happen with any of your magazines, and with both factory and reloaded ammo it sounds like you may have a really tight chamber. Just for the hay of it (a second time), grab someone else's spare magazine and give that a try - if it works without failure then it's the mags.
If you replaced the recoil spring, what tension weight spring did you replace it with (16 lb, 18 lb, etc.)? If you have used a lighter weight spring you may need a heavier spring.
Also, and this should really be your first test, remove the barrel from your pistol and holding it chamber up, try dropping each loaded factory round directly into the (clean) chamber to see if they seat fully; do the same with handloads. If any factory loads fail to fully seat, replace the barrel. If your handloads fail to seat, modify your reloading practices to better crimp the case for full depth seating.
The RIA pistols are solid mils-spec performers; if you need a new barrel go mil-spec, it is less expensive and should get you on the road to better reliability. HTH.
