I don't like that gun either for ctb, but for any rifle, I would place the butt of the gun on the floor and then place my mouth over the end of the barrel. That would stabilize the rifle and make it much easier to reach the trigger. But, again, the rifle you mention isn't the best choice for ctb. Personally, I wouldn't chance it with that gun. They shoot rabbits with that gun because it doesn't blow the small rabbits away. It's just not that powerful.