Trouble with Ejection failures with low recoil loads

[NahlaDoc]

I have run about 50 rounds through my new Benelli M4 and still have problems cycling low recoil loads ( slugs or buck) . The shells do not fully eject out. Anything under 1200fps does this. Is it necessary to run the high powered rounds through first and if so, about how many?? I already sent it back to Benelli once and they returned it with a lame excuse that it was the Strike Industries Hayl Rail I had installed. So i put the original hand rails back on and guess what- same issue. ANybody with advice???? Thank you.

[Gallo Pazzesco]

Check this out ...

 

Trouble with light loads in your new Benelli

[Redwingsfansfc]

A few hundred heavy loads through, and you will be fine to shoot them all.

[Kaiser]

The first outing with my new M4 : Fed it 25 Federal 00 Buck and 5 Remington Turkey loads. 
Second time out: 50 rounds of Remington target 9 shot. 
 

No issues at all. Ran the low brass like a champ. I do run my action well lubed. 

[Bluu Knight]

My first day of shooting I was target loads, bird shot and shooting clay birds, which I have not done before except one time the trainer there letting me shoot his double skeet gun. They worked perfectly, and it was a fun to do. My gun is the M2 tactical...