I would assume that since the "new" backpacker, with the 12" barrel, is rated at 480 fps in .22 cal it shouldn't need detuning for the Canadian market.... Since it is pistol based, and going over 500 fps is a PITA for most people, that might mean it could well be a good choice for a "shoot it the way you buy it" gun.... Of course if Crosman decide that to make sure some guy pumping it 30 times doesn't go over 500 fps and drill a hole in the valve like they did with the 2289, we'd be back to a 370 fps gun (or less) again....

Bob