I have one I bought early last year. Mine was made in 2011. I called Browning and found out they were a special run with only 50 made. Per Browning the barrels have a 1 in 9 twist. So far I have really enjoyed it.
The only load I have shot with it is Nosler's factory loading of 130 grain Accubonds. They average 3100 fps and I have no issues getting groups under 1". I have them as tight as 5/8". I will eventually start loading for it myself, but with a factory load doing that well I am in no hurry.
My plans are to take it with me to Montana in November on my mule deer hunt.
CH