I hope you're following GDP for this decision making process. Remember, if the document is not in SAP it doesn't exist.
Now you need a Pugh matrix to decide which caliber you want.
Mr Kelso,
If the gun won't be legal for limited for a whole year, you could always shoot it internationally or shoot it in open. Open guns are fun.
BTW, how do you like your 5.5" gun?
BB