Does anyone have any experience with this cartridge? The fact that its based off the .375 case is a definate plus in terms of producing ammo relatively cheaply, but are there any issues to it that I am missing.

I wouldn't imagine headspacing would be a real problem with the belted case, but I would appreciate input one way or the other from someone who has had more experience with it. As far as performance on game, any remarks on its effectiveness would as be equally appreciated.