Steel force heads are very good and super sharp. They fly great as well. I do agree with the others though, if the Muzzys are not getting good penetration you have more problems than just what broadhead to choose. It could be tuning issues, bad shot placement or a combination of both. I have found that Muzzy makes one of the best broadhead on the market, and in general will penetrate as well or better than most other heads of the same size.