i've used doubles for the last 10 years or so, but have very seldomly seen them otherwise. Most of my PH's are using either rugers or brno's, mostly in 416. All would love to have a double, but either they couldn't afford it or couldn't get another gun into the country (zambia for instance) I would expect to see a few more in circulation in coming years, just because of the price drop on new merkels etc. but i believe this will be more among clients than pros.