martin,
I use the same MTM Predator Shooting rest for both PCPs and Springers. With Springers, I use cloth rags on both rubberized rest sections to allow for smooth recoil. Also, I make sure the rifle can move freely forwards and backwards, in the shooting rest, to allow for proper recoil. Wedging the rifle firmly in the rest works fine for PCPs, not for Springers. WM