I have 3 balls with balance holes. All are located about 3" to the left and slightly below ring finger (lefty). All were put in to meet old balance requirements. Will plugging change ball reaction ?

Theoretical difference could be fairly significant on paper, but on lane difference is a little different story, I still don't buy it.  Maybe I'm just ignorant, but I'm just not seeing a bit of difference in ring separation to be that big of a deal . .

Yeah, well I beg to differ! I got a whole arsenal of balls with assorted weight holes in them, and that USBC rule about plugging them has pissed me off!

I spent money, went to classes  and learned all about the differences weight holes can make in ball motion; arc shape on the lanes; and additional "pop" at the pin deck!

I have a couple of sneaky balls with Mo-holes in them that don't do squat in terms of looks and hook on the lanes but they hit like a can of C-4 at the pin deck!

So plugging those holes in particular turns these balls back into boat anchors!!

Yeah, I guess for the average weight hole placement there isn't much difference but for me.......hell yeah!!! A big difference!

I was really pissed about the motion hole thing at first but after seeing my Hy-Road Pearl crack from motion hole all the way to finger hole maybe not having them is a mixed blessing.  Granted ball might have cracked anyway even without motion hole (plugged hole wouldn't make a difference I assume) but even if USBC brings back motion holes I would probably avoid them if I could in new balls.  Not good enough bowler to need that much fine tuning and didn't notice much difference when I plugged them.