I posted once before on the new X ring counting as 11 points.....Most people said they were subtracting dropped points from 330 instead of 300

I contacted the IBO Office asked them...The responce I got was that if a person shot 29-10' s and nine of those were 11' s and one 8 was shot thier score would be a 309. Not a 328, which is what you would get if you used 330 to subtract the dropped points

Ken, from the IBO is the one that explained it this way to me.