Yesterday I picked up a nice little a-bolt in .243 win. for a GREAT price. I got on Browning's site and found it was a 1991 model a-bolt hunter. I have never seen one with a fluted bolt though. All the ones I have seen have been the squared off looking bolt. I am no browning guru so this may have been how they were made back then. Just wanting a little more info on it. The gun shoots great though. Once I got it dialed in it would shoot a quarter size group at 100 yards from a bench. This is my first a-bolt and I could not be more impressed. Also the last 4 of the serial # is Z717 if this helps. Thanks in advance.