Odd then that my steel-force heads got the LOWEST penetration in my tests (Very repeatable)
In most recent testing, Slick trick was #1 Shockwave #2 Muzzy 3 blade #3 and Steelforce #4
All 100gn heads, shoot on the same arrow/s out of the same bow on the same day. at 270 fps (+/- 3 fps)