The numbers you want for Mule deer
| Total arrow weight | 440-490 gr |
|---|---|
| FOC target | 11-14% |
| Minimum KE | 50 ft-lb |
| Minimum momentum | 0.50 slug·ft/s |
| Typical shot distance | 40-70 yards |
| Recommended spine range | 300-400 for 60-70lb @ 27-30" draw |
Why these numbers
Mule deer hunting requires enough kinetic energy to drive a broadhead through hide and rib, plus enough momentum to keep the arrow penetrating after the cut. 50 ft-lb KE is the consensus floor for Mule deer — below that you start seeing surface wounds and lost animals when shots land less than perfectly.
FOC of 11-14% is what most heavy-arrow guides recommend for Mule deer. Below 10% the arrow plane-shifts on bone strikes; above 18% you lose practical accuracy at typical Mule deer distances.
Point selection
Fixed-blade for spot-and-stalk encounters where you'll likely have a clean broadside — mech blades are fine on calm shots but fail when the angle goes weird.
Insert / half-out
Light aluminum insert keeps the build closer to 11% FOC for flatter trajectory on longer mule deer shots.
Shaft picks
- Easton 4mm Axis Long Range Match Grade
- Black Eagle FOCUS Micro
- Gold Tip Pierce LRT
- Victory VAP TKO
- Altra 166 CENTRUM Premier
Build it now
Drop these specs into our free builder and dial in your exact bow. We'll compute live FOC, KE, momentum, spine confidence, and ballistic coefficient. Sight tape generation and shot solver (Pro) extend it for actual hunt prep.
Open the builder →Common mistakes hunters make on Mule deer setups
Going too light to chase speed. Sub-420gr builds look fast on the chronograph but can fail to penetrate on bone strikes. Heavier arrows lose only a few yards of effective range and gain meaningful penetration margin.
Ignoring FOC. A heavy arrow at 8% FOC doesn't penetrate like an equally heavy arrow at 14% — the centered mass plane-shifts on angle hits. Get the front weight up.
Skipping the spine check. A 70 lb bow with a 300 spine arrow that's actually too weak (because of long arrow + heavy point + cam-aggressive bow) will tear through paper but plane sideways out of the bow. Use the builder's spine confidence indicator — don't guess.
FAQ
What about heavier arrows for Mule deer?
Up to about 490 gr makes sense for Mule deer if you're confident in your shot. Past that you sacrifice trajectory more than you gain penetration. Use the builder's KE + momentum readouts to compare specific heavy builds.
Does broadhead choice matter more than arrow choice?
For penetration, the arrow does most of the work — the broadhead just gets it started. For wound channel size, the broadhead matters most. You want both balanced for Mule deer.