Many 'crossbow professionals' aren't crossbow users; just bow salesmen. NAP Spirfires Maxx will fly just great from your bow and won't open, as will Slick Tricks....assuming you're using the right arrow. I prefer carbon arrows with high FOC and small vanes. Specifically: Gold YTip Lazer II shafts, 110 gr brass insert, aluminum nocks and 2" Blazer vanes or 2.1" Fusion. I'm using the 100 gr Spitfires and Slick Trick mags in my 290 and 315 fps bows and the 125 gr Slicks in my faster bow in order to meet minimum arrow weight requirement for the bow. FOC ratio is 18% and 20% respectively. Accuracy, and terminal performance, is great with both heads. Best of luck.