The most forgiving fixed blade heads I’ve tested that are in Deep Six are: Iron Wills, Trophy Taker A-TACs, Solid Legends, Helix, Exodus, and Wacems.
Those all fly well out to 100 yds for me, with no adjustments from my field points. They are not as forgiving as field points, but with a well tuned bow, correct arrow spine, good FOC, helical fletching, and very consistent form (grip, back pressure at full draw, stance, arm position and release) those will all fly very well even at very long ranges. Wacems are too thin and weak for my taste, but the others are all top tier. Exodus is the most economical of the top tier Deep Six fixed heads, in my opinion. Iron Wills are the best. Helix don't have a big enough cut for me, even with the spiral wound channel. Solids have the biggest cut, if you go with the 125 gr model in 3/4" bleeders.
With a heavier arrow like a FMJ, I would make sure you have plenty of FOC. When I switched to a lighter shaft and heavier point/insert, my long range groups with fixed blades shrunk considerably.
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