Benelli M1S90 Entry Help

[ASH556]

I have a Benelli M1S90 14" Entry model that I bought last year. It was a new-in-box HK import gun with rifle/notch sights on the barrel and pistol grip stock. I have the following issues with the gun:

1) It won't run Federal LE1321B
2) POI is high compared to the sights with both slugs and shot
3) I'm debating ditching the PG stock for a straight stock.

I shoot a Benelli M1 in 3gun and that gun (28" field model with 12 round magazine) runs cheap Wal-Mart bulk 100%. I've read about Benelli's being weight sensitive due to the inertia system, but it seems that starting with a smaller/lighter gun (the 14" entry gun) should push the odds more in my favor. I do have a Surefire forend on the entry gun. Maybe I need to try shooting it without the light, but for an HD gun I definitely want the light.

From what I understand, lots of agencies ran/still run the Benelli Entry just like I have with Surefire forends. What does this come down to? A different spring? Different ammo? More break-in? Also, any thoughts on PG vs straight stock? I prefer straight due to my familiarity with it and ergos from 3gun, but also think the PG has merit for one-handed use in an HD situation (opening door, holding phone, child, etc).

[GJM]

I have a Benelli M1 with the same sights, and it shoots Brenneke slugs POA/POI. JDM has the mate to that Benelli, and as I recall, it also was POA/POI. I don't recall function problems with them, but I tend towards high brass #6, full power buck and Brenneke or Winchester 2.75 full power slugs. I also have a M2 with a 14 inch barrel, that I have noted no problems functioning with.

I would change the stock, before trying to adjust the sights, to see if the stock is a factor. You can likely file that rear sight to bring down POI if necessary.

[ASH556]

I may borrow the stock off the 28" gun to confirm the fit, poa/poi before buying one for the 14". I guess maybe I need to run a few more full-house loads to ensure it's not break-in. The gun has had maybe 25 high-brass rounds through it. It just aggravates me that the holy grail DocGKR load won't run the gun. It must be sprung heavier than my Field gun.

Pics for those who care:

[GJM]

I would lube and try some full power loads. Then, depending upon what you learn, I would remove the fore end and test again with the low recoil stuff.

[pablo]

Are you using the "push-pull" technique? A hard push-pull especially with a pistol grip stock can choke up an M1.

[ASH556]

Well, I got the gun running. The Surefire forend was too heavy it seems. I went back to the stock forend and it runs 100% even with 1200 fps target loads (Remington Gun Club). LE1321B runs perfectly as well. Still wanting a light on the gun for HD, I got a Nordic clamp with rail and threw on an X300U. Everything still runs perfectly. Finally, I added a Limbsaver pad to make the gun a bit more pleasent to shoot - still no issues. At this point I'm pretty well set with it for function. Just need to get it on paper again and confirm zero with buck and slugs.

[GJM]

Happy ending!

[JDM]

Didn't see this thread before. Glad you got it running!