I had a similar deal as the OP. I had a P64 300 that I bought knowing it was rechambered to 300 Wby. Well, nothing I did could make that rifle shoot. Tried every darned load and bullet and powder within reason and it just never was decent. At the end of the last range day I said to heck with it and ordered a Krieger. Well, then I thought about it, said maybe JES can do something 375 with it. Sent it to him in order to make it into a 375 Wby. Well, a couple weeks later he sent it back with a couple pieces of brass and a note that said it wouldn’t clean up as a 375 Wby so he made it a 375 Improved. I was sorta dismayed as getting dies for it wasn’t easy. A set of 375 Imp dies didn’t work for the fired cases so at the end of the day, I sent a few fired cases to Whidden, and he made me up some dies.
The rifle shoots amazing and he did a great rebore, but a phone call would’ve been nice just to know what he couldn’t do. It turned out fine and I wasn’t pissed about it since it does shoot quite well with any darned bullet I put through it. He also left it up stamped with his Normal XXX deal so I could have it milled and stamped nicely.
In the end, the dies cost more than the rebore, but now it’s one of my favorite bigger bored rifles. And it still looks good. I did put it into a Legend I liked it so much.
