Quote Originally Posted by venoman View Post
The UK spec factory spring was used if i remember Pauls was doing about 8.6 with 8.44 JSB pellets. A kit was fitted to a second rifle and that have now fired well over 500 pellets im told its putting out 8.8 ft lbs. Im finding it hard to believe that the power increase on these rifles Pauls went from just about 7ft lbs to 8.5plus. I have now bought a new 177 to see what power i get with this one. im at the moment trying to get a higher quality spring but this will not be until the new year.
That’s really startling to get that energy level from a .177 HW30, they don’t 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?