JES did a 30 to 35 rebore for me using the original cartridge. Just opened up the neck to 35 and bored and rifled the barrel.
You could do the same.
To reload mine, I used 350 remmag dies to necksize only.
Moderate loads with cast bullets dont need FL sizing.
If you had to FL size, buy a 303 Savage die and cut it off where the neck meets the shoulder at the point where only shoulder and body are affected.
Be sure to file off the original cartridge marking on the barrel as if it's there, he stamps a bunch of ugly "X" s over it.
I could do that ,.. I'm a loader and reload 37 calibers.. I don't really want a wildcat
