I know nothing about DRs & this site is my training class room! Thanks for the great posts.

I did handle a pair of WR rifles built in 1960's for the Maharaja of Cooch Bihar. The rifles were bought by my mate's father-in-law to be. The 280 was a double trigger made for the Maharani & I used it on a beat shoot in 1976 (never fired it). The 476 was a single trigger with a barrel selector next to the trigger that needed to be switched before the second shot. I am not sure if that was a very practical design. I suppose one needed to practice a lot with that particular rifle to switch the selector as soon as the first shot is fired. My $0.02 FWIW.