I was fortunate enough to get an HW30 laminate urban pro in .22 from AoA about two months ago. That must have been before the big rush. I'm also waiting on an HW95 urban pro, I hear they're stuck in customs.
The HW30 is not a toy. Out of the box it delivered between 6.5 and 7.5 fpe at the muzzle. Crosman premiere 14.3 grain ran
[email protected], H&N Crow Magnum 18.2 ran
[email protected], and FTT Greens 9.56 ran
[email protected].
In comparison, my Crosman 1322 pistol with a 14" barrel shoots 14.3 grain Premieres at
[email protected] with 8 pumps, and
[email protected] with 10 pumps.
I installed a Vortek pg2 spring which removed the twang, reduced the thump, increased cocking effort slightly, and saw no power or velocity increase. Interesting. Note, If you install a kit, make sure to deburr the inside of the piston bore. Otherwise the burrs will cut the piston.
I then added the Vortek pg2 piston seal and power jumped between 1/2 and 1 fpe across the board. Premieres are now 8.4fpe. Crow Magnums are 7.4fpe. The real surprise was the H&N FTT Greens which are now doing
[email protected] at the muzzle.
So now the HW30 takes only one power stroke to equal ten pumps on the 1322.
Question: why would the new seal increase power? The original Weihrauch seal is considerably softer than the Vortek. Perhaps when subjected to high air pressure, it squishes harder against the bore, causing more friction. The original seal was well greased from the factory, so it can't just be a matter of lube. I probably should reinstall the stock spring and see if power goes down.
And why would the tin FTT Green have a much higher muzzle energy than lead pellets? In any particular gun, all pellets will be subjected to the same driving air pressure and go through the same bore. Pellet energy losses are caused by barrel friction and pellet deformation. Tin pellets are much harder, the skirts may change shape less under air pressure and not bear against the bore as hard. Tin is also less sticky than lead. Tin pellet skirts may experience less permanent deformation, thereby absorbing less energy. This may explain why green pellets retain higher kinetic energy at the muzzle.
I have a Vortek pg3 kit waiting for the new HW95. Now that will be interesting!