Right out of the package, the 6-vane Helioses are noticeably smaller than Blazers. The vane configuration looks like a biohazard symbol, a design that Nockturnal says increases arrow spin, much like a helical fletch. With the nock, mine weighed 55 grains each. I made a fresh batch of Maxima Blu RZ 350s for this test, and the finished Helios-fletched arrows, without field points, averaged 291 grains while the Blazer-fletched arrows averaged 273 grains—an 18-grain difference. When put through a chronograph from my Bowtech RPM 360 (28.5-inch draw, 72 pounds) the Helioses shot 309 fps compared to 317 fps from the Blazers.