Hi Small Bore
Firstly thank you for the advice Dig but there is a little more to my reasoning for needing to reproof the gun. It all started at the beginning of the year when I purchased a couple of thousand of my usual 2 inch cartridges now usually my first choice is Hull cartridge company but at the time Eley 2 where the only ones available. Now as far as I was aware both manufacturers produced a quality product so I thought no more about it. Until the first double using the new batch of Eley cartridges the guns recoil made all the fillings in my teeth rattle and at my age that is quite a few. On inspecting the cartridge cases closely I could see that the tip of the cases had entered the barrels forcing cone and in doing so caused the recoil problem.
The cure I was told was to have the chamber length increased slightly and this would enable the gun to cope with varying manufacturers case lengths, the down side was if the chamber was materially altered the gun would need a reproof now as the bore diameter was .738 inch and had been that size for some 45 years to date my thinking was to have the work done and this would extend the guns life into the next century.
Now after giving it a lot of thought, Dig you were going to be my next port of call for a second opinion on the problem.
In case the worst did happen at the proof house I did write a post about the guns first owner and his very colourful history, it was quite long so I was going to post it around Christmas time but I am not sure now if the gun does not go for proof.
