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This is an interesting concept that has been tested by many people, however without any picture/video evidence that this actually improves accuracy, there's no point in doing this.
i use 1/4 inch slingshot darts and when i tested it the barrel without rifling made the darts fly 1-1 1/2 feet off target but the rifling improved this to about 7 inches around the target. note: i did all of my testing with a couplered big blast
