demonm4

i just took it out of the box, put it together and went to the range. i put 250 rounds through it. came home and cleaned the barrel, trigger housing, and just wiped down the bolt with out taking it apart. i only put oil on the bolt and on the part that slides down into to the recoil spring.

i just bought my m4 and took it to the range for the first time. i was using regular birdshot, but i was having mis feeding problems. is this normal or is there a break in period. please help.