i just got muzzy 3 blades like last week... and i think my accuracy got better than when i shot field points... don' t know what the diff is but all i can tell u is the practice blades go all the way through my target (black hole) and they are just flat...theres no way they cut it...if anything the hinder it more than help it when shooting at the taget and for some reason they go farther than my field points[:-]