HW 77/97 refurbish & venom tune

[Gibbon]

Thanks for your offer Paul, I've PM'd my address to you.

Well... The new spring, guides and piston sleeve are all fitted now. Trigger block is back on, all quite easy to do thanks to DaveL's excellent article.

Ooooo I'm very tempted to reassemble the rest, but I think I'll wait until we've got this blasted beartrap spring sorted rather than taking in bits again.

Thanks also to DaveP3@ for your offer of a full beartrap mechanism ... If Paul can't sort me out I'll get back to you

ATB

[Barrie_G]

Ooooo I'm very tempted to reassemble the rest, but I think I'll wait until we've got this blasted beartrap spring sorted rather than taking in bits again.
ATB

Or you could fit the bear trap and other parts and just fit the spring when it arrives.

[Gibbon]

Mmmm, good point Barrie. I'll continue the rest tomorrow.

[Paul Hudson]

Got mine apart - and back together...

Looks like it's been blowing back past the PowerPulse seal. There's no obvious signs of damage, but the seal is a few thou less in diameter, and MUCH harder, than the standard one.

Anyway, standard one is now back in and the power has more than doubled with JSB exacts (4.51). Next step is to chrony it over a few more strings and see what it settles down to. It's currently nudging the limit with no piston weights in place.

Gibbon. Your spring is parcelled up and addressed. I'll be posting it sometime tomorrow morning.

Cheers,

Paul.

[loiner1965]

y h email paul......

[Paul Hudson]

YHM back - it's yours FOC Steve .

Now why didn't I think of that... why on earth would they change the size of the compression chamber?

Paul.

[loiner1965]

YHM back - it's yours FOC Steve .

Now why didn't I think of that... why on earth would they change the size of the compression chamber?

Paul.

thank you...now i need a lazaglide piston....and a.......lol

[paterdale]

You may find that the pins tap out from one direction a lot easier (they dont normally require too much effort). With ref to the problem mentioned earlier.

[Gungeek]

My tip for when reassembling the anti-bear-trap device is to use Loctite lock 'n seal on the threads of the Stock Lug, part no. 8988. Regards ... Geek

[RAGS]

Hi Guys,

Any idea of the expected velocity in a 77/.22 with an venom FAC spring?

[Rustam Bana]

Hi Guys,

Any idea of the expected velocity in a 77/.22 with an venom FAC spring?

You will be looking at around 17 ft.lbs.. With a 14.5 grain pellet that works out to 726.5 ft./sec.

Good enough for shooting bobbing coconuts out at sea.

Rustam

[RAGS]

You will be looking at around 17 ft.lbs.. With a 14.5 grain pellet that works out to 726.5 ft./sec.

Good enough for shooting bobbing coconuts out at sea.

Rustam

Well , I assume so, esp as the 77 was doing 680 fps before I went and shot the Chrono . What's with the combro ? Building a pellet-proof vest are you

Shooting cocunuts at sea is a sport reserved for the CZ