I've read a few threads on this mold in an AR, but nothing on the odd shaped tip in the M4 feed ramps and only one on PC'ing them.
The bullet style is far and away different than any .22 bullet for an auto. I'm sure a Bolt or single shot could care less about the nose shape, but if anyone is or has used this in an M4 (two feed ramps) especially without gas checks I'd appreciate feedback.