They did... look into the FBI loads.
They moved to .40 because they got similar performance out of a shorter cartridge. Instead of a .45 sized frame/grip, the .40 shrunk it down to the 9mm frame/grip. If you aren't utilizing the rest of the capability of the 10mm, why keep the entire length?
They moved to .40 because they got similar performance out of a shorter cartridge. Instead of a .45 sized frame/grip, the .40 shrunk it down to the 9mm frame/grip. If you aren't utilizing the rest of the capability of the 10mm, why keep the entire length?