hw77 short stroke

[seagate]

Recently took delivery of a new 22 hw77 , I've done the usual deburr and tidy up of the internals , next step is to get a good fitting guide and top hat.
I've measured the stroke , it's quite a bit less than my 95/98 which clearly benefitted from a short stroke piston head , I'm left wondering would a 22 77 also benefit from a short stroke piston head and if so,by how much ?
Any thoughts on the subject.

[tinbum]

I like a 12mm reduction in the 95, but I find 8mm is optimal in the 77/97.

[seagate]

So 8mm it is then.

Thanks Nick.

[seagate]

Does anybody know if hw put piston weights in the 77 pistons ?

[tinbum]

Does anybody know if hw put piston weights in the 77 pistons ?

Its sort of like the top hats in AA's. They differ from gun to gun depending on how they perform in the factory. The only way to tell is to check. If they are there they will be held in with a small o ring.

[seagate]

I 'll check it out tomorrow.

Thanks again.

[T 20]

I like a 12mm reduction in the 95, but I find 8mm is optimal in the 77/97.

Hi Nick

As I'm just playing with a 77, I take it 8mm is also about the smallest stroke reduction you can make with a clip on extension ?



All the best Mick

[NickG]

Hi Nick

As I'm just playing with a 77, I take it 8mm is also about the smallest stroke reduction you can make with a clip on extension ?



All the best Mick

Mick , I have gone shorter, with a much lighter piston , needs more spring though.

[tinbum]

Hi Nick

As I'm just playing with a 77, I take it 8mm is also about the smallest stroke reduction you can make with a clip on extension ?



All the best Mick

No, its easy enough to go smaller, but 5 different sizes is enough and 8mm works.

[T 20]

Mick , I have gone shorter, with a much lighter piston , needs more spring though.

No, its easy enough to go smaller, but 5 different sizes is enough and 8mm works.

I ended up saying sod it and made a new rotating piston weighing in at 219g with a 75mm stroke.

I used a TX latch rod and altered the back block and fitted a CD trigger unit.





It'll probably be crap.




All the best Mick

[Captain Bongo]

I ended up saying sod it and made a new rotating piston weighing in at 219g with a 75mm stroke.

I used a TX latch rod and altered the back block and fitted a CD trigger unit.

Now that's TUNERWANG!!!!!!

[rgc_swanseaARC]

I ended up saying sod it and made a new rotating piston weighing in at 219g with a 75mm stroke.

I used a TX latch rod and altered the back block and fitted a CD trigger unit.





It'll probably be crap.




All the best Mick

And I thought I was being clever re-lubing and reassembling my 97k with Nicks short stroke this evening lol

[T 20]

I ended up saying sod it and made a new rotating piston weighing in at 219g with a 75mm stroke.

I used a TX latch rod and altered the back block and fitted a CD trigger unit

And here's the piston for anyone who's interested :-

http://s1138.photobucket.com/user/mi...tml?sort=3&o=0


And it seems to work very nicely after a bit of snagging.




All the best Mick