Ward Koozer (correct spelling) left us many years ago. He rebored an 8x50R Austrian double, I forget the make, to .45-70 for me. Probably forty years ago. I think it was my first double rifle. Interesting action with coilspring strikers. Grouped quite well with factory ammo. I still have a Koozer rebored High Wall in .44 S&W Magnum that began life as a .25-20SS. It might actually have been the very first rifle in .44 Mag. Quite a craftsman, I vaguely recall that he was trained by P.O. Ackley - or maybe it was the other way round. At the 1997 Safari Club convention I discussed reboring with Paul Roberts, at that time he was having .350 doubles rebored to 9.4x74R by LaBounty Precision in Maple Falls, Washington. Then the rifles were regulated, remarked and refinished in England, total cost about $5000. Roberts said the Germans were mad for Brit doubles in 9.3 and the conversion actually increased a gun's value. LaBounty's own circular said he would do the rebore alone for $900. I think LaBounty has recently sold his business to one of our better known gunsmiths, but I can't locate the name at this point. When I do I will add to this post.