OP, if you do buy land or seek to shoot on public land, these are the applicable RSAs. RSAs 207:3A, 207:3c, and 644:13. They can be found on the General Court site.
Loosely distilled down to.
300' away from an occupied building without permission of the owner. IANAL, but why am I seeing a loophole here-207:3A specifically prohibits discharging a firearm, etc within 300' for hunting purposes--644:13 only has the 300' reference during the "Compact Part" definition.
Not within 15' of a Class I-V road. I wasn't aware it was permissible within 15' of a Class VI-interesting.
Not across some specific roads. is it just me or is that a gap in the law, because I'd bet I'd get a ticket if I put a target 100' across the street and shot it from 100' into my property. I should get a ticket because it is dumb and unsafe
Not within the somewhat poorly described in 644:13 "Compact Part" of a town.
*Note, shooting in the WMNF has it's own set of rules and distances on their website.
I've always interpreted it as strictly 300' away, never across or within 15' of a road, and whatever the compact part is. Anyone else seeing gaps in the laws or have I been misinterpreting it the whole time?