.700 Nitro Express. Although .50 is technically the largest caliber you can legally own without an NFA destructive device permit (which California will never allow), there are exceptions for some cartridges determined to be for sporting purposes (such as the .600 Nitro Express, .577 Tyrannousaur, .700 Nitro Express, etc.). California also has a ban specifically on rifles which fire the .50 Browning Machine Gun (BMG) cartridge.
18
Yes
California has strict gun laws and I doubt that you can legally own a 20MM rifle in California. Usually the only guns available in California are small handguns.
Yes, provided you follow all applicable laws and regulations.
for a rifle it is thought to be a .50 calibre but a gun company made there own for there own sniper rifle the .408 calibre
If the Q is the rifle a 22cal then yes it is. I own 2 and you cant beat the little bogers.
Not legally. It's illegal for a felon to own a gun in any state.
If you mean legally, yes, in most states in the U.S. a person can own any caliber rifle that is available. I believe there are 1 or 2 states that have state laws restricting caliber.
You need a license no matter where you live or how small the caliber. A firearm is a firearm. No ifs, ands, or buts about it.
There is no way of knowing without you providing the Model of Browning rifle that you own,its caliber,and a good description of your rifles overall condition.
Your first step is to go the library and check out books on wood working
No. Alaska is the largest US state by area, and is not its own sovereign nation. California is the largest state by population, but it too is not its own sovereign nation. However it would be possible FOR California to be its own sovereign nation, because of its massive economy and population (california has the 8th largest economy in the world, about US$1.6 trillion, and the 34th largest population in the world)