5-7 split convert with a 6# ball hitting the left side of the 5 pin the ball hitting the 7 pin

The 5-7 split is why you need a 6lb ball: picking up the 5-7 split with the ball hitting the inside part of the 5 pin then the ball bull dosing the 7 pin down. the 6lb ball hits or takes out both the 5 then the 7 pin same with the 5-10 split.

One of my 50 game marathons I did it 5 times this way & have done in league as well. on league I use a 12lb ball accept if I get the 5-7 or 5-10 then I sometimes use the 6lb mix by storm its a urathain ball.

The ONLY reason I use Urathain is because polyester plastic balls brake up easy. NO bowling ball should ever be made of a VARY breakable plastic Polyester should have NEVER been used for bowling balls period because it creates a BIG problem: when it starts to shatter it continues to shatter around all holes in the ball. when it shatters it leaves small sharp pieces on the lane & in the pin area (EVERYWHERE) so then those pieces chip other balls: that is ALL other balls no matter what they are made of!