I am not a competitive shooter and make no claim to know a great deal about cutting edge benchrest technique. That being said, my take on this is, I seem to shoot about the same size groups using a hard hold as I do when I use my left hand to make final adjustments to the rear bag before I squeeze the trigger. There is however,quite a difference in the POI between the two methods. I use the hard hold to adjust my scope for hunting because it more closely matches the hold I use when shooting at meat. This is only my opinion.