[M4 fails to load 3rd round]

Steve, i will try the spring and see if that works. Thanks for the advice. 

 

Bill

[M4 fails to load 3rd round]

I am using Fiocchi Golden pheasant at 1485 FPS.

[M4 fails to load 3rd round]

Sorry i also typod this. This is an M2 not an M4. The plug is installed and no other modifications. The 3rd shell always gets hung up. If i pull back the bolt and release it will chamber the round. I have completely disassembled and lubricated everything. It's always the 3rd round.  

 

Thanks!

[M4 fails to load 3rd round]

I am having problems with my M4. It always seems to be the 3rd round doesn't fully load. It gets caught in the process. Would this be a problem with the spring or should i look at something else?