I have been pondering a .375 Cheytac or .375 Am as a big brother to my .338AM, but got side tracked a little. I do not know a thing in the world about the 416 Barret. It is bascically a .50BMG shortened and necked down to .416 from what I read on wickpedia, but with about 40 grs more capacity than the 408 based cases. It has me really wondering what a .416 case with minimal body taper and a sharper shoulder would do when necked to .375. Here are my questions? 1. Downfalls of the .416 brass problems etc.? 2. Rocky Mountain RBBT bullets ? I have used a few in a buddy's 375 CT, seem to shoot okay any idea on performance on big game? 3. Reloading stuff? I have never dealt with .50 BMG sized cases. What am I going to need for trimming cases, priming them etc? What primers do they use? 4. I am thinking about a McMillan big .50 repeater action, any experiance? 5. Probably a Lawton 10 Twist .375 would get used since I do not plan on shooting solids. That sound about right as far as twist? 6. I know I will not make weight in some states as far as legal for hunting. How many states have weight restrictions? 7. Is this just a bad idea? 8. I know I will have to have a finish reamer ground and a reamer for a sizing die, anything else that I would need to get on order? Any input is appreciated, especially contact info for anyone who has tried this.