I have 2 of these rifles, one an Axis II in 223. Rem.. The other a 308 Axis XP. The 308 shot fine unless using Military ammo but that all changed this summer... This precipitated me to disassemble the bolt. No dirt grime but the spacer and springs both of them had become tangled up so I untangled them put them back in same light strikes..

So I disassembled the bolt and built (machined) a much better brass washer to put between the two springs I also built a spacer to go into the rear threaded bolt cap (.125" ) to increase the spring tension in the FP... Now military ammo or anything else fires fine... Btw when this problem developed the rifle had around 1200 rounds through it... I don't like the washer between the 2 springs at all with the loose fit of the spring inside off the bolt and the fit of the spring on the FP I can't believe that this doesn't happen more frequently..

The Axis II in 223 has never had any problems.. YMMV..