I don't know any FFLs who won't proceed after 3 days, absent some other factor that gives them pause. And having been an FFL I can tell you that having asked an ATF Inspector specifically about this, the guidance I received was not threatening in the least. (No, well its your respnsibility of something bad happens) The processes a FFL must follow are very clear. Follow the process and you are clean. Cut corners and you will have a problem.
I was not specifically talking about NH. After Sandy Hook Maryland had a 6 week delay to just RUN the NICS check. It happens. I wasn't specifically talking about NH.
IIRC there are some box stores that won't do it, but if someone is buying from a box store they deserve whatever self punishment they get. When someone tells me they buy a gun from a box store or puds, I think of those people in the middle east who flog themselves with chains or whatever till they get bloody. Except in the US, instead of a durka snackbar, its a skinflint flogging themselves with a flail made out of pennies that are strung together with music wire or something.
The other thing that has been happening lately according to some dealers I talked to, is there are a lot of NICS checks that go into delayed/resarch and never get resolved. So basically anyone with a full blown delay is getting f***ed unless the dealer does a default proceed after 3 days. At this point I literally would refuse to buy any guns from a shop that doesn't do a default
proceed, especially if someone has a known delay problem.