What the others have said is true, reactive resin bowling balls do hit harder, it's newer technology and was designed to strike more. that being said, the biggest things that promote carry are rev rate and speed (in relation to ball weight [for the sake of this example pretend all balls at 15 lb]);
Speed: simply put, a ball that hits the pins at 20mph with transfer more energy to the pins than a ball that hits at 15mph. the faster the ball hits the faster the pins are moving when hitting each other and the walls which allows them to "bounce" around which leads to messengers
Rev Rate: the simplest example for this is looking at a two hander like Jason Belmonte with that 600+ rev rate, if you watch video of him bowling, he gets amazing carry and more often than a lower rev rate stroker.
The whole debate is that strokers are precision player's where as crankers are power players that have a larger margin of error to get a strike.
Way's to increase carry: there is no "magic ball" that will increase carry amazingly, newer technology reactive resin balls are designed to do this better than the older technology that is urethane.
when throwing the ball, keep your hand under the ball and lift on release, this will increase rev rate which "can" lead to better carry.
All that being said, focusing on getting better carry is a poor way to improve your game, focus on hitting your mark and the pocket consistently to promote more strikes as apposed to trying to find shortcut's

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