are you one of those people that is in a legal Catch 22 because of the "misdafelony" that is still on your record, that has gotten relief from the MA Firearms Board, but are still considered a Federal PP because a the DWI conviction had a potential penalty of over 2 years?
I've got no experience in that department, but IMHO if the conviction is still on your record ( not a CWOF, not pardoned by the Governor, not re-opened and disposed of in another manner) I would venture an opinion that the Federal Database is still going to show you as a PP per their interpretations of rules/law.
If that is the case, what I would suggest to you if you want to really clear things up is to hire a good lawyer that can go back and ask for a new trial based on a claim of ineffective counsel because you were not told that by pleading guilty you would become a PP.
NTassel is who I would call
IMHO the Feds don't recognize the States restoration of your 2A rights without the guilty charge being removed from your record because it is that pesky over 2 years POTENTIAL penalty that triggers their denial