I have shot both size pins and overall I like .019....for me, the smaller the pin, the better my groupings. It also lets you get a closer pin gap for fast bows. It also takes up less space when looking at a target, giving you clearer view. But I think it comes down to what you like. if you have bad eyes you might want to go with .029. some companys now offer a .010 pins...that's a little small for me. I don't think you could go wrong with either