Dwell should be fine at 14 with decent paint
Never reduced my LPR pressure Phillip? When the LPR did drop (to about 80) on my IR3 it just caused drop off under rapid fire
I would say if it is on or around the 90/95 mark then leave it be...
Could check to see if the balls are feeding properly into the marker. Pop 2 in the feedneck. Fire the first one and make sure the second drops into the breach properly and doesn't either jump out the neck, or bobble around in the neck
Are the balls breaking in the barrel or on the actual bolt?