Contact Springfield Armory Customer Service through their website, and request an owner's manual. I could describe the process, but unless you know the names of the parts I would mention, my description would be meaningless to you. And you SHOULD have the manual anyway.
You will have to call them to find out.
It is a target pistol made by Springfield Armory.
You will have to call the factory
see the link below
check: http://stevespages.com/page7b.htm
Best left to a trained gunmsith
100-1000 depending on specifics
Follow instructions in owner's manual.
Best thing to do is to get a gunsmith to help you.
Best left to a trained gunsmith.
You need the help of a gunsmith
The Springfield Armory 1911A1 manual states that +P ammunition should only be used in firearms with barrels of at least 5".