HW 77 power issue

[T 20]

With Accupels at, I think 14.3grain, you are doing about 543fps.

Still, I think 543 is a little low for a HW77.

Cheers, Phil

Hi Phil

I think 543 is a little low as well.


Post 17
http://www.airgunbbs.com/forums/show...7+power&page=2


Don't worry folks the gun is still in bits until I decide whether to destroke it or not.


All the best Mick

[olivercromwell]

Apologies for jumping in here but where would I find a spring for the HW77 with reduced power?

I'd try the shop where Amac got his...

[Amac]

Nice one Oliver ! Finallly got round to adjusting the power on the old 77. I used a few coils from the old spring to match the originals length and got an initial reading of 13.5. Three strips and much grinding of coils later,the gun was putting out 11.2. However, following about 100 shots on Sunday she has crept up to 11.8 so will have to remove yet another coil. The gun is shooting really smoothly I must say following her minor makeover and will no doubt be doing so long after I have left this mortal "coil".
Andy

[Lumberjack]

.......the gun was putting out 11.2. However, following about 100 shots on Sunday she has crept up to 11.8

Glad you're sorted. Spooky how they creep up when everything beds in eh? When I fitted a new kit to mine it started at 10.2. A tin of pellets later 13.5. All fixed now I'm happy to say.