Going through a box of brass and ran into this. It is labeled .351 trimmed and ready to load. It is trimmed to 1.372 to 1.374. It is headstamped R P 357 Max. It has been shortened and looks like it has been put in a lathe and turned to semi-rimless cartridge. It is pictured with a standard 357 max R P Case. It appears to be made from new brass. If it was turned on a lathe it had to be very labor intensive. I am guessing I have 140-160. What is the name of the cartridge? Demand?
All input appreciated
Thanks
Doug