The funny thing I've noticed with 597s is that the more expensive ones don't seem to shoot well! I bought the cheapest one available and shoot the crappiest federal bulk pack ammo through it with amazing accuracy, while my Dad bought the TVP top-of-the-line 597 for 5 times the cost and we can't find any ammo that groups very well with it, inspite of the heavy barrel and target stock, etc.
Weird eh!?
Weird eh!?