Proof House would say "Submit it for proof as this is the only way to tell. It will either pass or fail. They will not give an opinion as to whether it will pass or fail ,as it it not their remit to do so.They would tell if the gun was acceptable for proof,is. tight on face, free of pits and bulges.They would recommend that you contact an approved gun maker ,one of the Guardians and ask there opinion .

Sorry my PC is being stupid and missimg letters so I hope this make sense.