A recent book by Max Hastings, "Winston's War, 1940-1945," has WSC practicing with small arms at Chequers in anticipation of Operation Sea Lion and a German invasion. It doesn't specify the weapon, but I seem to recall it was a pistol!
Somewhere (not in Hasting's book, I believe) there's an image of Churchill at a driven pheasant shoot during the war years or perhaps just before, possibly in the 1930s.
And, finally, that Mauser pistol was returned to the Prime Minister, many years after his capture in South Africa. Churchill had inserted a calling card beneath one of the pistol's grips. The finder duly returned the lost weapon to WSC in London. (I can't remember where I read this account, but I believe it's accurate.)
JP
