Quote Originally Posted by Hsing-ee View Post
Thatís really startling to get that energy level from a .177 HW30, they donít get that with the very stiff Vortek spring. Is there a very thin piston washer involved or some other way the stroke is lengthened? I had a .22 that would do 9fpe with the very light Hobby pellets, and I thought that was the most one of these little guns would do, the most a .177 would be good for was a bit over 7fpe. Where has that extra power come from? Did you modify the transfer port? Or is that a trade secret?
I'm guessing there may be a heavy tophat involved?