hey guys. i had a custom built out of a stevens action. started out as a 22-250 and i built a 17-204. had my smith order a new mag box(brownells i think). anywhy, it will not feed the rounds unless i so it real fast. also, the 2nd from the top round just pops out before i can even get the bolt 1/2 way closed no matter how fast i work the bolt. any suggestions??. thanks