# Arrow Specs # 70" bow | Arrow Spec — 55lb bow at 31" Draw ## Bow Summary

Spec	Value
Bow	Galaxy Black Ridge 70" Longbow
Rated draw weight	55lb (at 28" baseline)
Your draw length	31"
Effective draw weight at 31"	~61–62lb (+2lb per inch × 3" over 28" baseline)

--- ## Arrow Requirements

Spec	Value	Why
Spine	400	Real-owner tested on this exact bow at similar draw length and weight
Arrow length	31–32"	Matches your draw with safe clearance past the shelf
Material	Carbon	Carbon Express Predator line specifically recommended by Black Ridge owner
Point weight	100–125gr	Heavier point suits longbow efficiency — real owner confirmed 125gr
Total arrow weight	490–620 grains	8–10 GPP × ~61lb effective draw weight
Minimum arrow weight	488 grains floor	Never go below 8 GPP on this bow
Straightness	.006 or better	Standard for carbon at this weight class

--- ## Do NOT Buy These

What	Why
500 spine	Too weak/flexible for ~61lb effective — poor flight, inconsistent
30" arrows	Too short — point may pull behind rest at full draw (safety risk)
Arrows rated "20–50lb"	Your ~61lb effective draw is outside their stated safe range
Fiberglass arrows	Not rated for this draw weight — risk of shattering

--- *Based on real owner data from Archery Talk forum + GPP math at confirmed 61–62lb effective draw weight.* # 70" bow | Arrow Spec — 55lb bow at 32¾" Draw ## Bow Summary

Spec	Value
Bow	Galaxy Black Ridge 70" Longbow
Rated draw weight	55lb (at 28" baseline)
True draw length (AMO)	32¾" (32" measured + 1¾" AMO standard)
Effective draw weight at 32¾"	~64–65lb (+2lb per inch × 4.75" over 28" baseline)

--- ## Arrow Requirements

Spec	Value	Why
Spine	400 (stiff end) or 340	At ~65lb effective, 400 is borderline — 340 is the safer spine choice depending on brand chart
Arrow length	33" minimum	At 32¾" AMO draw, a 32" arrow does not clear the riser safely at full draw — 33" gives minimum safe clearance
Material	Carbon	Carbon Express Predator line specifically recommended by real Black Ridge owner
Point weight	100–125gr	Heavier point suits longbow efficiency — real owner confirmed 125gr
Total arrow weight	520–650 grains	8–10 GPP × ~65lb effective draw weight
Minimum arrow weight	520 grains floor	Never go below 8 GPP on this bow
Straightness	.006 or better	Standard for carbon at this weight class

--- ## Do NOT Buy These

What	Why
500 spine	Too weak/flexible for ~65lb effective — poor flight, inconsistent
32" arrows or shorter	Too short — point pulls back behind rest at full draw (safety risk at 32¾" draw)
Arrows rated "20–50lb"	Your ~65lb effective draw is outside their stated safe range
Fiberglass arrows	Not rated for this draw weight — risk of shattering

--- ## 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	~64–65lb

--- *Based on real owner data from Archery Talk forum + corrected AMO draw length of 32¾". Previous estimates used 31" — all numbers updated to reflect the correct measurement.* # 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.* # 68" bow | Arrow Specs — 30lb Recurve Bow at 27–28" Draw ## Arrow Spec — 500 Spine (Preferred) > Correct spine for a 30lb recurve at ~28" draw. The Sanlida Noble already includes 6 carbon arrows at 500 spine — these are the right choice for this bow.

Spec	Value	Notes
Spine	500	Standard correct spine for 30lb recurve at ~28" draw
Arrow overall length	28–30"	Matches her 27–28" draw with safe clearance past the shelf
Shaft material	Carbon fiber	Carbon or aluminum both acceptable at this draw weight — carbon preferred
Point weight	100gr	Standard field tip — matches spine chart assumptions at 30lb
Point type	Replaceable screw-in field tip
Fletching	Plastic vanes or natural feather, 3–4"	Either works fine at this draw weight
Total arrow weight	240–300gr preferred / 210gr minimum	See GPP table below
Straightness	.006" or better	Confirm with seller
Max safe draw weight rating	Must cover 30lb minimum	Almost any listing will clear this easily

--- ## Arrow Spec — 600 Spine (Acceptable Alternative) > Slightly more flexible than 500 — still works fine at 30lb, widely available, and often cheaper. Good backup option if 500 spine is unavailable at the right length.

Spec	Value	Notes
Spine	600	Toward the flexible end for 30lb — acceptable, not preferred
Arrow overall length	28–30"	Same length requirement
Shaft material	Carbon fiber or aluminum	Both fine at this weight
Point weight	100gr
Total arrow weight	210gr minimum	Same GPP floor applies
Straightness	.006" or better
Max safe draw weight rating	Must cover 30lb

--- ## GPP Reference Table > GPP = Grains Per Pound of effective draw weight. Based on 30lb effective draw.

GPP Tier	Calculation	Total Grains	Use Case
Minimum safe floor	7 GPP × 30lb	210gr	Absolute minimum — do not go below this
Preferred target	8 GPP × 30lb	240gr	Sweet spot for beginner target practice
Upper end	10 GPP × 30lb	300gr	Heavier end — still fine, just slower

--- ## Bow Reference

Spec	Value
Bow	Sanlida Noble 68" Takedown Recurve
Rated draw weight	30lb (at 28" AMO baseline)
True draw length	~27–28" AMO
Inches over/under 28" baseline	~0" (essentially at baseline)
Draw weight adjustment	~0lb (negligible)
Effective draw weight at full draw	~30lb
Shooter	Right-handed beginner

--- ## Do NOT Buy

What	Why
400 spine or stiffer	Too stiff for 30lb — arrow will not flex correctly through paradox, poor flight
700 spine or higher	Too weak/flexible for even 30lb — inconsistent flight
Arrows shorter than 28"	Too short for her ~27–28" draw — safety risk
Fiberglass shafts over 30"	Heavy, inconsistent, poor spine rating — the included Noble arrows are better
Arrows rated below 30lb	Outside safe range — almost never an issue at this draw weight

--- ## Notes on Included Arrows The Sanlida Noble 68" kit includes **6 carbon arrows, 30" length, 500 spine** — these hit every spec on this sheet right out of the box. No immediate arrow purchase needed. When replacements are required, match these same specs: **500 spine, 28–30" carbon, 100gr field tip.** --- ## Draw Length Reference

Measurement	Value
Physical measured draw	~26.5" (wingspan method: 67" ÷ 2.5 = 26.8")
AMO standard adjustment	+1¾"
True AMO draw length	~27–28"
Inches over 28" baseline	~0"
Draw weight adjustment	~0lb
Effective draw weight	~30lb

--- *Last updated: June 2026. Included Noble arrows (500 spine, 30", carbon) confirmed correct for this setup — no immediate replacement needed.*