My 416 B project has stalled at the moment due to issues with the brass projo's & I probably have a Brake problem as well.
I am very reluctant to use a brass projo on an animal as well.
The 400 tsx shoots fabulously in my 416 without the brake best yet is 3 shot 10.5mm @ 220 yard, not so good with the brake though, shame thier BC is mud.
I have another brake coming to compare to see if I do indeed have a brake issue.
I have been trying to get some Rocky Mountain projo's.
I had it all sorted, but then the supplier had more issues with export permits and gave up, hopefully George can get another exporter or sort it somehow.
His projo's would make a massive difference in the .416 & the .338 when he starts building them.
So I guess you would have to make sure you could get his or similar bullets on this side of the world before you go to far down the track.
I am in the process of building an Edge, yours and other stories have inspired me, as cool as the .416 B is @ 30 lbs its not a carry rifle for more than 200 ish metres, unless I go to the gym 24-7 which isn't gunna happen.