so I have a little Ruger 10 22 SbR. I have shot thousands of rounds through it with very little trouble. All the sudden it will not shoot right. Stove pipes, failure to eject,and jamming on feed ramp. I have tried cci Mini Mag, MagTek, federal bulk pack, Winchester hollow points, all of them fail. I have shot over 600 rounds trying to diagnose it. Thorough cleaning, swapped charging handle,swap bolt, and have used six different magazines still have failures. problem started last week I just left the range today and I am very frustrated. I do not know what else to try. But have wasted precious ammo trying to diagnose it shooting at boring paper target at gun range. any advice would be helpful but I am at wit's end pictures of failure to follow. my favorite little gun to shoot is giving me fits.