Just a couple of notes on 303 Savage cases, PPU vs. SuperX
I had 12 old fired SuperX cases, average weight with spent primer 147.1 grains; water capacity to the mouth 48.7 grains
I had a couple fired PPU cases, average weight with spent primer 170.0 grains; water capacity to the mouth 45.0 grain.
Takeaways
o PPU brass in quite a bit heavier than the old 190gr SuperX cases (15.5% heavier).
o PPU brass internal capacity is 7.5% less than the SuperX cases ... the same grain load of powder and OAL in a PPU case is going to generate higher pressure.
