HW30 Tune

[Hsing-ee]

Mine is .177 Craig and doing 8.4 ft lbs. I'm looking at buying a .22 cal to see what can be achieved with this in the coming weeks. Mach 1.5

What brand spring is it running? Mine is still German low power so need to swap it out …

[TonyL]

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.

[venoman]

What brand spring is it running? Mine is still German low power so need to swap it out …

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.

[Hsing-ee]

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?

[venoman]

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. ?

[evert]

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?

I'm guessing there may be a heavy tophat involved?

[Mach 1.5]

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

[maximus]

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.

[robthedog]

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

I recently got a 2nd 30 thats had a the LSD treatment which includes a glided piston, lovely little rifle which is doing great work at bell target

[Mach 1.5]

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

[TonyL]

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

It's going to be lovely, Paul.

[NickG]

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.

Hi Lyn,
If the spring you are getting is the same spec but longer for the 30 I would be very interested in trying one.

[NickG]

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 ☺️

[Mach 1.5]

You want a 30 now NickG don't you? Mach 1.5

[NickG]

Maybe 🤔