I tried wearing thicker socks and gloves but they didn’t really help, in fact I found it difficult to fire the gun at times because of the gloves.
Can you give me some advice on what I should be wearing to keep warm?
For pigeon shooting I tend to use fingerless mittens when the weather is really cold, but they do not stop your fingers from getting chilled.
Probably your best bet, if you really suffer, would be the many versions of charcoal hand warmers or gel packs that simply sit in your pocket, and that you can hold between shots.
You can also get them to sit inside your boots.