Great review by the way Steve. I like the dual chronograph comparisons, at the muzzle and downrange at the target. I'm trying to recall if you've done this in your other reviews. One thing I've noticed is that my non-regulated Huntsman Regal is not pellet fussy shooting at 50 yards. In order of best accuracy for my rifle, the JSB 15.89gr, 18.13gr, H&N Baracuda Hunter Extreme 19.09gr, and lastly JSB Predator Polymag Shorts 15.89gr. Those are the only pellets I've tried so far. The one thing I've also noticed between the JSB 18.13gr and 15.89gr Diabolos is that either one is as accurate as the other on any given day depending on the wind but the 15.89gr edges out in accuracy in the end.