Benelli M4 cycling issues

[craiggreen]

Hello,

I got a Benelli M4 a while back and I'm having issues cycling low power rounds like birdshot and normal 2 3/4" buck shot. It will cycle slugs, 3" magnum buck and 3 dram birdshot fine. Has anyone else had this issue?

[NCswamp13]

If it's a brand new gun or has a low round count, you probably just need to run 100-200rnds of full powered loads like slugs and buck through it. It's fairly common I think. I had to do it with my M4 and M3. 

[John Doe]

This is an interesting subject. The day I bought my Benelli I bought about 200 rounds of #7 bird and ran through all of those rounds without a single issue. Since then I have run pretty much everything you can legally buy off the shelf (I can't order ammo online they will not ship it to me where I live) and I have not had a single malfunction. The only rounds that did not cycle for me were the non-lethal rounds. 

I hear people say that they have had issues with their Benelli not cycling certain ammo, not many but a few, and I always think why? Why do so many people not have an issue cycling anything, yet, there are people who do. Anyone out there have any theories on this?

[NCswamp13]

Both my M4 and M3 struggled with 7.5 and 8s at first but after the "break-in" period of about 150 hot loads.......they both cycle anything. Non-lethal and mini shells not included.