My boys have always shot Easton Power Bolts with 4" vanes with crescent nocks. I've had them shoot both, Spitfire Expandables and ST Magnums. I think they both fly very close. However, both kill shots were with the Spitfires. Kody killed his buck 2 years ago at 60 yards with the Spitfire and Klay at 30 last year. Both bucks didn't go far at all and Kody's dropped in sight.
The only time Kody shot at a live target with the ST's he shoulder bladed a buck, but I'm sure it was his error. At a target they fly good.
With all that said, most of the reading I've done says expandables are better out of a crossbow. Not saying they are because I love ST's, but that's what some say.