Just try a different broaodhead. Maybe that particular one doesn't spin right. Try shoot a different one or a different brand/type.

I think muzzys are particularly picky to bow tune.

shoot mechanicals,you wont have to change anything probably,ive used them for years and they always produce,i shoot st3 titanium firstcuts and they shoot exactly like my fieldpoints

shoot st3 titanium firstcuts they fly exactly likefieldpoints

You just need some fine tuning if they're grouping.

TFOX has gotten me straightened out. Thanks a bunch man.