In 1986, Congress amended that bogus 'law' to allow states to set rules for restoring gun rights to people who've been pardoned or whose convictions have been "expunged, or set aside."
In 2004, Wyoming's legislature compounded, and agreed with the federal infringement by passing a 'law' meant to govern how such convictions could be expunged:
"-- Individuals would have to wait one year after completing their sentence; they would not qualify if their misdemeanor conviction involved the use or attempted use of a firearm; and they could not have any other convictions that prohibit them from owning guns. --"
The US Constitution is clear in that no level of government can infringe on our right to bear arms. -- A fiat prohibition on a persons RKBA's for "a misdemeanor crime of domestic violence" is clearly an unreasonable regulation regardless if written by fed, state or local 'lawmakers'..
That sheriff in Bighorn County should refuse to enforce it.
Until the Supreme Court overturns it it is still the law of the land. I doubt it has even been challenged until now. But even now its constitutionality is not being challenged merely technicalities wrt its implimentation.
I do agree it is an unnecessary infringement and, if the current court doesn't throw it out, the next with more Bush appointments might.