I purchased a 12g SBE3 last year and it consistently shot high, definitively high with multiple shots and chokes, much more like 90/10. I purchased and used the largest shim Benelli offers (D shim) and this did not resolve the issue. I discussed the issue with Benelli USA support and they assured me that they had other technical options to correct the problem. I returned the gun to Benelli and within 3-4 weeks the gun was returned with a pattern test and I also tested the gun at 21 yards myself. The pattern is now excellent and well within spec. Benelli mad adjustments to the barrel stop ring and the magazine spring tension. I am pleased with the assistance I received from Benelli USA to resolve my problem. I am disappointed somewhat that I have had to send this top of the line shotgun in for adjustment in the first place, as I own other Benelli's and I have never had any issues with them. If your SBE3 shoots significantly high, send it in.
In the BTW department, I would not recommend trying these adjustments DIY. I have seen several YT videos showing heating up your magazine tube, etc.....don't do it.
