I put two Lane regulators in at44's .25 both love the JSP 25.4 pellets. One gun had the bob's mod shooting 850fps. The gun without Bob's mod and just a Lane regulator filled to 240bar will get 27 full power shots at 745fps, regulator set at 135bar. The gun is a pellet on pellet 30 yard gun. Sorry I havn't got out any where to stretch out its legs. The Lane regulator is a plug and play, no hole to drill regulator. If you need help on the install pm me. Joe