I asked the same question a few weeks back. It just seemed the Walther Talon-Hunter-Mag seal was a little to easy to install. I read here recently about how the seal could expand with the force of the piston traveling down the compression cylinder. Make sense. Anyway, I have the Crosman-Benjamin-Turkish-Chinese-ETC 1.175 from JM on hand. I'm waiting to buy a Chrony here shortly and see what FPS I'm at and then maybe swap it out.