Sometimes the BX-1 requires a little bit of tuning/adjustment. Tandemkross sells a small toolkit for them and has a tuning video on YT. My daughter shoots a 10/22 race gun in Steel Challenge. I upgraded to TK springs in her mags after having a few feed issues in matches. I also added a set of Kurt Grimes' aluminum base pads for easy mag changes, but that's probably overkill for others on this thread.