Who made match grade SSP's beside the Germans and Austrians?

[HectorMedina]

Actually, it is a category all of its own, LOL! Since no other commercial rifle has used that technology.
HM

Later versions of the Walther LGR had a design update where the piston head appears to be floating,
and is preloaded by disc springs.  This might be an attempt to allow the piston to move during the firing cycle
as you describe. (I have a link to an interesting photo unfortunately as a newbie I am not allowed to post it!)

AJB

WOW, Anthony, talk about a spectacular entrance!

Amazing info. THANKS and Welcome to the Forum.

I have handled a few LGR's, while repairing them. Not overly surprised of their demise. The closing FORWARD effort is a study in bad ergonomics.
AFAIR, the closing effort for the LGR's was easily TWICE that of the GAMO 126, but I must have handled older versions because none of them appear different from each other.

You have brought up a very interesting possibility that was not available back in the days of the LGR: Wave springs.

Wave springs could easily be replaced in that space and will give you a LOT more room to maneuver. In this case, we do not want excessive FORCE (typical of disc springs, or, as we call them on this side of the pond, Belleville washers), if you still have that LGR with a floating piston (or can buy one for cheap), you may be interested in looking into this technology:

https://www.smalley.com/wave-springs/crest-crest-shim-ends

Trick here would be to coordinate full compression of the wave spring to correspond with top pressure in the cylinder at end of the cocking stroke. This would allow maximum travel of that floating sub-piston, keeping as much pressure as possible behind the pellet for a little longer.
Given that the energy is the integral (area under the curve) of the pressure vs. the pellet position in the barrel, the more we can keep the top  pressure uniform, even for a millisecond will make a HUGE difference.

Thanks for the great input, and, again, welcome to the forum.

Keep well and shoot straight!





HM

[Poor Ballistics]

AJB and Hector,

Interesting information about Disc and Wave springs.

I ended up buying Alsky's  Walther LMG-2 Junior.  It was exactly as described by Alsky.  I it really amazes me how rifles decades old can stay in good condition  through more than one owner and shipping episodes.

So far know no one has been able to explain why an SSP  can have the velocity increase on the second pump.  There is no check  valve like on a multi pumper,  so what is going on?

I was able to duplicate Alsky's  data.  The second pump does increase the velocity by about 20 fps.  As Alsky proved,  it is not from the metal warming up. Using an FWB 601, he waited 10 and 15 minutes between shots, and has posted the results  on previously to this thread.   

🤓