Once i figured out ammo problem tiger 223 rounds where geting stuck. I went to range with 10 federal 223 and 20 federal 5.56. All rounds cycled great but only had 10 rounds left to start zeroing. Fired 2 3round groups 1st had to come left .ran out of ammo after 2nd group. I wasted 4 rounds missing target completely .hope to finish this weekend.