Well, two points:
1) New Hampshire is going to be Massachusetts North at some point in the future... maybe
near future, maybe
distant future, but look at how neighboring Vermont went from freedom to oppression in the blink of an eye. Some said it could never happen, but it did.
2) Even for the Southern free states, the US House of Reps is going to pass a new, awful AWB. Then it will be up to the Senate. You know Biden will sign it if it passes... so moving to a more secure Southern free state is no longer a guarantee.
You were wise to invest in some 10-round magazines. Don't kick yourself for it. Oddly enough, many RI folks I know own 10-round magazines just so they can shoot in MA. Now, it's going to reverse itself and I will need 10-round magazines in order to shoot in RI.