I remember when the brilliant politicians in NJ decided to make hollow points illegal and called them 'cop killers.' The fact is, a hollow point will stop in a vest before ball ammo. If they had half a clue they would have done the reverse.
The longer the barrel the better. If you want to go smaller than the Scout Squad rifle then you would be looking for light and fast. The M1A is a main battle rifle. It is not light and fast, It is best at destroying cover and reaching out a long way with the power to devistate potential cover.
Yea, you can do it. Just use your inlaws address. When you move, then change it to that address. You do not have to wait until you move into your new home.