I am wondering how much "loss" there is when firing plain old .280 in a .280 AI rifle ? I understand about the web stretch if the round isn't put together to fireform, I'm just wonderin' about velocity you would give up
From all I've read about it, the loss is around 5%- just like most other "improved" rounds. Haven't chronoed the 280 version, but I've seen it with the 257 AI and 30 Gibbs.
