So I saw your post and clicked on the NC forum where I've been to ABC stores.
I don't think they get allocations, although some do tend to stock more specials than others. Example--the Plymouth store stocks more than the Center Harbor shop.
Gun shops really depend on what you're looking for. I can't say I would recommend any of the larger shops. I hit up Abe's and Goodhue Marine semi regularly. Abe's is an ever changing rotation small shop with great prices and Goodhue has a decent stock of various stuff, but cash is king there because his CC markup is awful.
Goodhue, Shooters out of Hooksett(not a firearms friendly gun shop) and Manchester Firing Line are in the Glock Blue Label network, but that doesn't help an out of state dude.
If you like Sig stuff, Sig has a shop in Epping(might have moved according to their emails). They have a kickass .mil/LE/Sig Academy student discount and from what I've heard in their shop they play well with other states.