Accuracy in my 220 is actually better with the 2 3/4" than the 3" Accutips.
In the 20 gauge I had, the 2 3/4 were more accurate as well.
impossible to say for sure until you test your own gun , slug shotguns are highly variable in what they like
I use a FF2 2x7 on my Savage , no issues and the 2x has allowed for some quick close up shots
