M4 cycling issues

I have a new h2o Benelli M4 that does not like federal buck shot. It has a fft aftermarket mag, and wolf spring. Everything else it stock. What do you all think of this malfunction. Is this a break in/ not enough powder in the load? Fwiw it runs slugs and #8 bird shot no issues. I have about 150 rds through it. Pic for ref. https://uploads.tapatalk-cdn.com/202...fd3de76a13.jpg

My black eagle likes to be moist. Especially with some powder residue.

Low recoil buck wont run 100% until you have a lot of rounds through it.

Oil. Lots of oil.

Thanks for the reply?s!