As an approximation, you're generally looking at a 1ft.lbs difference in muzzle energy between .177 and .22 with the 30, pellet & set-up dependant, of course.![]()
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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.
.22 Venom Mach 1 (FAC) 6-25x56 Millett.
.22 Venom Mach 2 Thumbhole 6.5-20x40 Leupold EFR.
.22 Venom Mach 2 Sporter 4-12x40 Leupold.
.177 Venom Vantage 4-16x50.
.177 Venom Daystate 8-32x56 AGS.
.22 Venom Datstate 4-16x56 AGS.
.22 Webley Venom FX2000 6-18x40 Busnel Legend.
.177 Titan MPT by Steve Pope 6-24x40 Tasco.
.177 Pro-Sport 4-16x50.
.22 Webley FX2000 3-9x33 Leupold EFR.
.177 Logan Solo 4-16x50.
.22 HW90 (spring powered) 4-16x50
.22 Gamo Stutzen.
.177 Walther lever action.
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?
Im finding it hard to believe that is why i have now bought a new 35s to see what the outcome is with that, im trying to do this before Christmas. I will be having a .22 cal to see what the outcome of that one is. I have not changed the stroke , fitted a V-Mach piston seal. ?
.22 Venom Mach 1 (FAC) 6-25x56 Millett.
.22 Venom Mach 2 Thumbhole 6.5-20x40 Leupold EFR.
.22 Venom Mach 2 Sporter 4-12x40 Leupold.
.177 Venom Vantage 4-16x50.
.177 Venom Daystate 8-32x56 AGS.
.22 Venom Datstate 4-16x56 AGS.
.22 Webley Venom FX2000 6-18x40 Busnel Legend.
.177 Titan MPT by Steve Pope 6-24x40 Tasco.
.177 Pro-Sport 4-16x50.
.22 Webley FX2000 3-9x33 Leupold EFR.
.177 Logan Solo 4-16x50.
.22 HW90 (spring powered) 4-16x50
.22 Gamo Stutzen.
.177 Walther lever action.
Following on from the successful tune of my .177 HW30K. One in .22 cal has just been ordered and this one will be glided. I'll report back once completed. Mach 1.5
Last edited by Mach 1.5; 30-05-2024 at 02:13 PM.
What surprised me about the HW30 was just how much pre-loadcthere was with the standard spring set up. More than some of its high powered siblings I reckon.
Plinkerer and Tinkerer
It appears to get a little extra FPS out of these then go for the K barrel as in the kit format as the barrel is 1.7 inch shorter than the open sight version if a little FPS is required of course. Mach 1.5
Anyone know the stroke length, just wondering how much it could be increased , see what the potential is for upping the power a little. at 25 mm 11 fpe is available from 70 mm stroke but with a big spring .
I have had a 21 mm tune making power from 70 mm stroke, (on a softish spring) so thinking maybe aim for 10.5 but at a shorter stroke, obviously easier with a .22, I would be wanting it in 177, call me ambitious 🤣.I don't own a 30 so just thinking out loud ☺️
You want a 30 now NickG don't you? Mach 1.5
Maybe 🤔