Hatsan Can’t find a plateu point

[Jarkko]

I cant find a plateu point for my hatsan factor sniper l.

Im trying to make a low end tune. About 35fpe. Reg pressure about 75bar.

Problem is that in those low reg pressures the spring hammer wont add speed even when i start from the loose end spring tension.

Do i have too strong spring?

 

[LDP]

Yes.

 

[Jarkko]

Can anyone suggest a spring that would suite better for this power level?

 

[Stubbers]

Can anyone suggest a spring that would suite better for this power level?

If you have a set of calipers, you can measure the springs dimensions (wire diameter, spring od, spring length) and count the active coils, then input that data into a website that calculates spring ratings (commony lb/in). From that you can deduce a slightly weaker spring of equal length.

-Matt

 

[JimD]

You could also shorten the spring.

 

[Caliber 22]

You could also shorten the spring.

I normally keep the original parts and do modification with different parts. If the modification does not work as intended or I just want to reverse the modification, I can always go back the the factory parts and try again.

 

[JimD]

That's a good way to do it.