For a 3D, go Rhinehart. I too have the Broadhead buck. The frame and insert are self healing foam. I didnt get the mileage out of the insert as others on here, which at $50 a pop for replacement, It soured me a bit. As for me I got no more then 2 months out of the core before I started shooting through it with nothing but field points. I will admit though, im using very heavy wood arrows that are hard on targets. I like the thing, even if it is small, but Im using a butt target for the majority of my heavy practice sessions nowdays, and only use my 3D BB for broadheads when season is coming on.