First of all, welcome to the T&TH site. It's a great place with helpful folks who'll share their experiences with you.
I don't know what kind of choke that .649 e.d. is but it could have potential. I think you might get much better patterns if you'd switch to some #6 shot. I'd recommend the Winchester HV (Black Shells) with 1.75 oz. of #6 shot. It's a great load.
I'd also recommend that you "deep clean" that barrel. I wrote an article, "Cleaning a Shotgun Barrel"
and you can read it athttp://www.allaboutshooting.com
It can help your patterns a lot with that gun. You may also want to take a look at the SSX for the Beretta at that site. It works very well with your gun and all of the lead loads but best with #6 shot as well.
Best of luck and if I can be of any help, just let me know.