My advice - choose another state. Hawaii basically sucks for gun owners. I've lived on Oahu( honolulu) and every year the Democratic ruled goverment has tried to change the laws to attempt to seize our guns OR tax them into non existence. This year they proposed to increase the taxes on gun purchases by 40% and raise tax on ammo by 50%. You'll also need to apply for a "federal license" whatever that means to prove you can buy ammo in that caliber.
So you need to own a gun in that caliber or you can't buy ammo.
It's not a political statement when I say Democrats - it's just we have had the same party in power for almost 40 years with the exception of Govenor Linda Lingle. I thought she did a fine job but there are alot of underline factors on why the Democrats keep getting re-elected. A majority being that the unions are very strong in a limited population base island, and are in bed with the current goverment.
IN CONCLUSION- if you love the 2nd amendment then seach for another state. Hawaii sucks for gun owners and the cost of living is outrageous.