# 70" bow | Arrow Spec — 50lb bow at 32¾" Draw ## Arrow Spec — 400 Spine (Preferred) > Best choice for a newer shooter — stiffer spine is more forgiving of inconsistent release and anchor point while building form.

Spec	Value	Notes
Spine	400	Sits at the stiffer end of the 400–500 workable range for ~60lb effective — preferred for form forgiveness
Arrow overall length	33" minimum	At 32¾" AMO draw, a 32" or shorter arrow does not clear the riser safely at full draw
Shaft material	Carbon fiber	No fiberglass — not rated for this draw weight
Shaft inner diameter	6.2mm	Standard carbon ID
Point weight	125gr preferred / 100gr minimum	125gr pushes total weight to ~459gr, clearing the preferred floor with margin
Point type	Replaceable screw-in field tip (8-32 thread)	Swap for broadheads when hunting capability is needed
Fletching	4" shield-cut natural turkey feather	Real feather preferred — quieter, better clearance on a longbow shelf
Total arrow weight	459gr preferred / 420gr minimum	See GPP table below
Straightness	.006" or better	Confirm with seller before buying — not all listings state this
Max safe draw weight rating	Must cover 60lb minimum	Reject any listing rated below 60lb

--- ## Arrow Spec — 500 Spine (Acceptable Alternative) > More commonly available at budget price points. Works at ~60lb effective but sits at the more flexible end of the workable range — less forgiving of form errors than 400 spine.

Spec	Value	Notes
Spine	500	Toward the flexible end of the 400–500 workable range — acceptable but not preferred
Arrow overall length	33" minimum	Same safety requirement as 400 spine
Shaft material	Carbon fiber	No fiberglass
Point weight	125gr preferred / 100gr minimum	Same weight floor applies regardless of spine
Point type	Replaceable screw-in field tip (8-32 thread)
Fletching	4" shield-cut natural turkey feather
Total arrow weight	459gr preferred / 420gr minimum	Same GPP floor applies
Straightness	.006" or better	Confirm with seller
Max safe draw weight rating	Must cover 60lb minimum

--- ## GPP Reference Table > GPP = Grains Per Pound of effective draw weight. Based on ~60lb effective draw.

GPP Tier	Calculation	Total Grains	Use Case
Minimum safe floor	7 GPP × 60lb	420gr	Absolute minimum — do not go below this
Preferred target	8 GPP × 60lb	480gr	Sweet spot for target and hunting-capable use
Upper end	10 GPP × 60lb	600gr	Heavy traditional hunting setup — not required

--- ## Bow Reference

Spec	Value
Bow	Galaxy Black Ridge 70" Longbow
Rated draw weight	50lb (at 28" AMO baseline)
True draw length	32¾" AMO (32" measured + 1¾" AMO standard)
Inches over 28" baseline	4.75"
Draw weight adjustment	+9.5lb (+2lb per inch over baseline)
Effective draw weight at full draw	~59–60lb
Shooter	Right-handed

--- ## Do NOT Buy

What	Why
600 spine or higher	Too weak/flexible for ~60lb effective draw — poor flight
300 spine or lower	Too stiff for this setup — arrow will not flex correctly through paradox
32" or shorter arrows	Point pulls back behind rest at full draw — safety risk at 32¾" draw
Arrows rated below 60lb draw weight	Outside manufacturer's stated safe range for your effective draw weight
Fiberglass shafts	Not rated for this draw weight — risk of shattering
Field points for hunting	Field points are for target practice only — swap for broadheads when hunting

--- ## Draw Length Reference

Measurement	Value
Physical measured draw	32"
AMO standard adjustment	+1¾"
True AMO draw length	32¾"
Inches over 28" baseline	4.75"
Draw weight adjustment	+9.5lb
Effective draw weight	~59–60lb

--- *Last updated: June 2026. Confirmed arrow example: 33" pure carbon, 400 spine, 100gr field tip, 434gr total weight — passes all specs. Upgrade to 125gr points recommended to reach preferred 459gr floor.*