[QUOTE=Flashinthepan;4020846]Firstly happy new year to one and all.
Re proofing of barrels etc i would suggest a quick look at the birmingham proof house site which is a mine of information
http://www.gunproof.com/Proofing/proofing.html
From it comes this quote
Foreign proof marks
Until June 1980, there was reciprocal agreement for recognition of certain foreign proof marks by international agreement. Since June 1980 when the United Kingdom became a member of the International Proof Commission ( the CIP), the United Kingdom has recognised all the proof marks of other member nations and reciprocally they all recognise United Kingdom marks.
The USA is not a subscriber to the CIP.
You do not need the barrel to be proofed to import it but, if you buy it through a UK dealer, it must be proofed before he can offer it for sale (to you) even if the sale price is zero. The dealer is the one at risk.
The offence occurs at the point when the barrel is offered for sale.
Your (and your club's) insurance may be invalid if using an unproved barrel.
The finished gun must be on your SGC (or FAC as appropriate) as it is modern - as soon as you have "component parts" ie pressure bearing parts.
One final point: I don't believe there is an exemption for antiques - even if they are collector's items only, unless the Proof House issues a certrificate of unprovability.