I have one an improved version of the 300 win mag now that I have proven all the project notes are on my site venompublishing dot net.... I am getting a 333fps increase using a 200 grain Barnes bullet over the parent 300 Wincehster magnum... I am calling mine the 300 Venom Magnum Sniper, and it is ready to allow others to convert their 300 win mags if anyone is interested they can email me, and we can talk... intersesting idea... I have designed several wildcats using the Ruger cases... I am hoping to get one going soon.