Difference between the 16J and 20J HW97K?

[ReturnTrip]

In .177, is the only difference the spring?

[lefteyeshot]

16J=11.8fpe=800fps w/8.3grs pellet
20J=14.7fpe=892fps w/8.3grs pellet

[SpiralGroove]

In .177, is the only difference the spring?

Yes ...............

[Deerstalker]

This may help folks.

To convert to Joules multiply FPE by 1.3558,  Joules to FPE multiply by .7376.
FPE Formula is Pellet weight (gr) x FPS x FPS divided by 450240 or 450436.7

[lefteyeshot]

I just use the Pyrmyd computer.

[Denby95]

The original poster was only asking if the difference between the two power levels is only the spring so that if he purchases the 16J version, he can later go full power if he choose to and that there was no permanent unalterable restrictions in the gun beyond the spring in order to achieve this.

[tjk]

16J=11.8fpe=800fps w/8.3grs pellet
20J=14.7fpe=892fps w/8.3grs pellet

What about .22 specs?

[ReturnTrip]

The original poster was only asking if the difference between the two power levels is only the spring so that if he purchases the 16J version, he can later go full power if he choose to and that there was no permanent unalterable restrictions in the gun beyond the spring in order to achieve this.

Couldn't have said it better myself. 

I've been checking the 16J version out at Krale. Never having owned Weihrauch myself, I am unfamiliar with the internal differences between the 20J and 16J versions in .177.

[Mark 611]

RT, I understand you may have only wanted a single answer? but this is an open forum, IMO, any useful information that is added to a thread to help someone else reading the thread who may not understand and is trying to gain knowledge on a subject like this? again IMO, it's all relevant, not all 16j guns can be made 20j guns with just a spring change, 

[lefteyeshot]

16J=11.8fpe=800fps w/8.3grs pellet
20J=14.7fpe=892fps w/8.3grs pellet

What about .22 specs?

16J=11.8fpe=616.03fps=w/14grs pellet
20J=14.7fpe=687.57fps=w/14grs pellet

[SpiralGroove]

RT, I understand you may have only wanted a single answer? but this is an open forum, IMO, any useful information that is added to a thread to help someone else reading the thread who may not understand and is trying to gain knowledge on a subject like this? again IMO, it's all relevant, not all 16j guns can be made 20j guns with just a spring change, 

Yes, Mark ............ I was gonna add more information, but the HW97 - in it's modern configuration .... only requires a spring change to convert 16j to 20j.
Krale lists both .............. and I assumed that was his reference.

Yes ........ was the simple answer .

[Mark 611]

True in this, for the newer guns, but as you know other Q&A will be brought up, 

[SpiralGroove]

True in this, for the newer guns, but as you know other Q&A will be brought up, 

  Yeah, older guns could have transfer port or stroke/piston length/diameter differences - all affecting power.

[Jason_Garvin]

The other difference between the two is the 16j will me easier to cock and your joints will thank you during longer shooting sessions as you get older 

I have not procured the 16j from overseas but I believe these late models only have a different spring set up,

Jason

[triggerfest]

The original poster was only asking if the difference between the two power levels is only the spring so that if he purchases the 16J version, he can later go full power if he choose to and that there was no permanent unalterable restrictions in the gun beyond the spring in order to achieve this.

Couldn't have said it better myself. 

I've been checking the 16J version out at Krale. Never having owned Weihrauch myself, I am unfamiliar with the internal differences between the 20J and 16J versions in .177.

So the difference is 4J only obviously.

Will you notice that ? Not really.

The only reason why Krale sells the 16J version as well, while there are no power restrictions in Netherlands, people like to have a 16J version out of the box (= UK power limit restriction) to shoot FT/HFT competition on UK rules. In that case not more than 16J is allowed. But also no tune or spring exchange is needed.