Sitka Mountain Gear
Arrow spine help
Equipment
Contributors to this thread:
500grainsofDEATH 03-Feb-20
12yards 03-Feb-20
Predeter 03-Feb-20
JTreeman 03-Feb-20
weekender21 04-Feb-20
Shawn 04-Feb-20
500grainsofDEATH 04-Feb-20
500grainsofDEATH 04-Feb-20
Scooby-doo 04-Feb-20
Predeter 04-Feb-20
500grainsofDEATH 04-Feb-20
Predeter 04-Feb-20
weekender21 05-Feb-20
x-man 05-Feb-20
12yards 05-Feb-20
500grainsofDEATH 05-Feb-20
x-man 05-Feb-20
500grainsofDEATH 05-Feb-20
500grainsofDEATH 05-Feb-20
x-man 05-Feb-20
500grainsofDEATH 05-Feb-20
weekender21 06-Feb-20
03-Feb-20
I'm at 55lbs draw weight and 27.5 draw length. I'm about to build some more arrows and had a question about spine. I'm either going with Easton Axis with 100 grain ethics halfout or Victory RIP TKO with 100 grain ethics Halfout. What spine would you say I need for either one? I also plan on bumping up to 60lbs so Idk if I need 350s or 400 or 300 or what? Help me out guys.

From: 12yards
03-Feb-20
It probably depends on the broadhead weight you want to go with and how long you are going to cut your arrows. But 400s are probably out for sure.

From: Predeter
03-Feb-20
With jumping up to 60lbs and assuming you're shooting a 100gr broadhead, I'd go with the 300's.

From: JTreeman
03-Feb-20
400’s are out. I suspect 350’s are your huckleberry, but I always error on the stiff side so I wouldn’t rule out 300’s either. They make a thing called a spine chart, probably be a good place to start, if you are on the line go stiffer with the extra weight of the half-outs.

—Jim

From: weekender21
04-Feb-20
400's aren't necessarily out. Everyone's just guessing unless you give point/insert weight and how long you're cutting your shafts. If you have that information I'd be happy to run it through my archery software if you shoot me a PM. If you want to be exact, your bow make/model and current arrow speed will help.

From: Shawn
04-Feb-20
Wow, .400s are perfectly fine. I draw 28"s and shoot a 26.5" .400 spine with a 175 grain broadheads. My bow is set at 62#s. Perfect through paper and perfect bareshaft. I don't get why guys shoot super stiff shafts. Shawn

04-Feb-20
I'm using 125 grain heads abd cut my arrows at 25". Ive also got some 150 grain field points im gonna try out. Probably using VPA 3 blade.

04-Feb-20
I'm using 125 grain heads abd cut my arrows at 25". Ive also got some 150 grain field points im gonna try out. Probably using VPA 3 blade.

From: Scooby-doo
04-Feb-20
At 25"s do you know how stiff those carbons are?? You could shoot .500 spine at 25"s with 125 grain head and 60#s. Shawn

From: Predeter
04-Feb-20
Yeah, I'll withdraw my above comment. With 25" arrow you are fine with .400's per Eastons chart.

04-Feb-20
Even with 225 to 250 grains of weight up front?? I know easton chart says its fine with the 75 grain hit but I despise HIT inserts. I have some ethics components coming in the mail tomorrow that are 100 grains.

From: Predeter
04-Feb-20
Even with the extra weight out front I think you would be ok but if your worried just go to the 340's. Being on the stiff side is perfectly fine.

From: weekender21
05-Feb-20
I ran the numbers on archers advantage. Even with 250 grains up front (100 grain insert and 150 grain BH) you're still on the stiff side with a .400 spine Easton Axis @ 25" shooting your 27.5" draw Triax at 60 pounds. I've never had any issues tuning a slightly stiff arrow, you should be just fine with the 400 spine arrows.

From: x-man
05-Feb-20
Is there a specific reason you want your arrow so short? I have a 27" "rule of thumb" minimum for all of my customer's arrow shafts. Even the kids with 22" draw lengths. The shorter the arrow, the less forgiving it is with regard to arrow flight.

From: 12yards
05-Feb-20
Yeah, wow! That is a short arrow! I cut my arrows 1.5" shorter than my draw length, but I don't know if I could even do 2.5" shorter. My tip/broadhead would be in my rest I think.

05-Feb-20
My shop has me at 25" and I honestly like it right there. My point is about an inch ahead of my rest. My shop has treid many times to get me to cut my arrow shorter than that and bring my rest back as far as it will go.

From: x-man
05-Feb-20
Your broadhead should be in front of your hand at full draw, always.

05-Feb-20
Where I live its very common to cut arrows shorter than draw length. My brothers draw is 28 and he shoots a. 24 inch arrow. I'm fine with mine being 25 inches. I don't like my point ahead of my riser.

05-Feb-20
Last time I had arrows cut at my shop theybtried to talk me into cutting another inch and a half off and bringing my rest back. i told em no

From: x-man
05-Feb-20
Sounds like you need a new shop.

05-Feb-20
I get that alot but I dont really have another shop to go to. Id have to ride almost into Georgia to the second closest one.

From: weekender21
06-Feb-20
There is no safety reason to have your BH in front of your riser. If you decide to touch your BH at launch I'm willing to bet you won't repeat that mistake. I've been sooting 28-28.5" arrows with fixed blade BH’s for years with a 29" draw. Zero issues and can't even picture how it could possibly be a problem.

For a beginner archer, it's not a bad idea to cut a half inch in front of the riser.

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