You're very lucky to have a Sidewinder. I had a Longbow sidewinder in .177 and it was so smooth to cock and shot lovely. I sold it as I planned to get another in .22, but it was just when Webley went under and unfortunately I never managed to replace it. I saw this Tommy for sale a long while back and jumped at the chance to at least own one of the old Webleys.

I got my Chambers order today. Very good service from them to receive it so fast! The seal looks good and almost the same design as the Vmach seal. Its very tight in the chamber though and doesnt slide down on its own, even with the transfer port uncovered. Will I need to size it, or is it being a tight fit beneficial?