I asked my pro-shop guy about a heavy, HEAVY oil ball for conditions similar to a long PBA pattern at times, because others in my bag just didnt cut it. He recommended it, and I am glad I bought it. The ball was 15lbs. ,5oz and had a 2.5-3 pin, as well as a top weight of about 2.6 oz. Our YABA shot varies every week and as of late, more heavy patterns and this ball preforms. Not as much as I though, (the ball was drilled with the most aggressive drill spec that came with the ball, i forgot what it was), but the ball just didnt come back. the ball has a beautiful hit when the lanes are about med-slightly heavy oil, but the ball never rolls up in time on heavier patterns, even with my 17 mph speed leaving many-a-split. I plan to get a little more side weight taken out to hook earlier, but a solid ball that is VERY Versatile on its surface. You can polish the ball for drier lanes and still have the hitting power weaker balls for that condiditon dont have. I recommend the ball, but advise not to depend on it to be too aggressive on HEAVY patterns. When conditions are right however, there are NO 10 pins left at all. The ball hits. That is its best quality.