Belted cases are made short to the shoulder and undersized in the body.
There was an excellent reason when they were invented.
As my big game is killed with a semi-auto belted magnum rifle I only use fully prepped new brass when hunting.
Shoots 3 sub moa which is good enuf.
No reason for belts anymore unless you're shooting a break open rifle that you can't find a rimmed cartridge for.
Waiting for a semi-auto in 300 Norma or 30 Nosler.