Rifleer, our notes about decreasing group size is assuming that you have a correct load developed to begin with. If your load data is giving you unacceptable groups to begin with, I'm not sure how your rifle would react positively with the Damper.
The proven results using our Damper on a k31 are based on the projectile being a 175 gr, and no other weight. We've had emails from shooters using the3 168 SMK telling us it works just as well for that bullet weight, but the design is specifically meant for the GP11 and 175 projectile reloads. Whether or not it works well with a 150 is something I don't know.
It took nearly six months and some 35 different Damper profile, weight and placement prototypes to arrive at the one we now send to distributors. Swiss Products takes a lot of time with R&D and field testing before we ever put anything out with our name on it. Example:
Late last year our Type P/S Diopter was finally accepted by the Swiss SSV as being Swiss sanctioned for all international shoots, including in Switzerland itself. This process took a full 12 years and as many prototypes to gain acceptance. We're the
only American company ever approved by Switzerland in that arena.
Interesting thing is that every single prototype submitted to the SSV disappeared into the membership of the Board of Directors, including the last one. It's considered bad form to request the Swiss return our un-approved Diopters, so their membership apparently liked even our early ones.
Our Type P/S Diopter beat the Germans
and the Swiss mfg's in that it's the world's only true k31 1,000 yard Diopter that works without any rail changes at all. For an American mfg to get's it's foot in the door in Switzerland is a feat in itself, so........... Does that Damper really work? Waddayathink?