In all my years of working with M/L long-guns, I have never run into a "Keyed" and "Pinned" wedge but have read about them. That is until my latest acquisition. A Pedersoli SxS in 12Ga. I knew it was going to be there as soon as I pulled the barrel. Sure enough, there it was and a pretty neat application. This SxS only has one wedge that you really can't afford to lose.
I only mention this because I think this application would be suited on a double wedge application where the two fight each other and one will lose and fall out. As an example, the Lyman Great Plains. Basically the wedge has a slotted shank and the stock channel has a pin, that rides in the slot and keep the wedge from falling out. It may come loose and kind of hang out but your will never lose it. I have a friend of mine who always carries an extra wedge. I suspect that I will be converting his and mine, before next hunting season...
Be Safe !!!
I only mention this because I think this application would be suited on a double wedge application where the two fight each other and one will lose and fall out. As an example, the Lyman Great Plains. Basically the wedge has a slotted shank and the stock channel has a pin, that rides in the slot and keep the wedge from falling out. It may come loose and kind of hang out but your will never lose it. I have a friend of mine who always carries an extra wedge. I suspect that I will be converting his and mine, before next hunting season...
Be Safe !!!