Ammo is no problem at all if you’re a handloader and have any 308 Winchester brass laying around.
View attachment 651265
Just resize in the case, trim to proper length, chamfer the case mouth, load, and go.
Ted
The case looks darn good and modern resized in the .300 die before trimming, I like that neck and shoulder.
I make my .300 brass from .308 also. One of the first steps is FL resize in .308 Small Base die. Then into the .300 die and trim. Makes feeding in my Models 99 better.
Darryl