Ted,
You may get better performance but maybe not.
I trust you've tried a bevy of sabots?
This. I have/had a Hastings, a Remington, and Mossbergs. All shot more than acceptable with the slugs they liked, but they didn't all like the same slugs. My current two both shoot the Lighfield EXP well enough. The one also like the Federal Barnes slugs and I still have two boxes, but I still just use the Lifghtfields. Easier to just have to keep one brand around.
As an aside, I've had better luck, accuracy wise, with 2.75" slugs than the longer versions.
