I'm using 5" parabolic RW helical feathers. I have 2018's that just don't fly well with the Ribteks and I have a couple of new 2216's I'm going to try this morning. I will get some 2117's and try them also. Since the 125gr judos fly great with the 2016's, wouldn't 125gr Snuffers likely fly good too? Is a 457gr arrow enough for heavier game like elk? Thanks for getting back to me.