Can't go wrong with starting with a well tuned bow but the most INHERENTLY accurate fixed blade head that I have ever seen is the Rocky Mt. "Turbo" (now the RM Blitz) followed pretty closely by the G5 Striker, Slick Tricks, and NAP Nitron.

All 4 have the same thing in common, that short narrow ferrule design. I was amazed at how well all 4 of these heads shot even when I purposely tried them on untuned bows or oddly spined arrows to see what they would do.
The Turbos were just plain SICK though. I could group them like field points out to 50 yards and there was simply ZERO variation from field points at any distance and they stayed the most accurate when I tried to MAKE them fly off target.

Matt is right a properly tuned bow will shoot just about any FBH. The thunderhead is a solid proven head and many swear by them. I currently have standard Muzzy-3 blades on my arrows but this summer I am going to look into the new Slick Trick Grizztricks. They look awesome!!

I have been shooting Thunderheads for 20 years with good sucess. I can't tell you about the others....

Slick tricks-compound Wensell Woodsmans- recurve


hatchet jack

Right now I say slick tricks with much optimism.

In September I have a feeling I'll say it with much confidence.

Just got some, assembled them, and they make my muzzy standard 3 blades look... awww so cute!

Most accurate? Well if you're comparing all fixed blade heads, it has to be a 2-blade head. You can't argue with physics... or well,I guess you could but you won't really get anywhere.

Here are my results after LOTS of testing:
Most accurate 4-Blade: Slick Trick
Most accurate 3-Blade: Sonic
Most accurate 2-Blade: Magnus Stinger

SS Snuffers 100gr second best NAP Hellraisors

As far as accuracy and seemingly TUFF, the G5 striker will be in my quiver.

I agree with Ryan. Out of a TUNED bow , they all fly well.

my muzzy 3blades shoot very well, great patterns, though differently not the same as field tips.