RIP TKO Spine

[holmesac89]

Hey guys, I've talked myself into switching from 5mm axis arrows to RIP TKO to cut down on total arrow weight. I'm a 30" draw, 29" arrow, and 70 lb draw weight. I run 175 grains up front including point, collar, and insert. On the Victory website, it appears they're recommending a 300 spine. Any other brand's spine chart I can recall seeing has had me in the 250-260 range. I'm tempted to go ahead and buy the 250s just to be on the safe side with a stiffer spine. Does anyone else have quite a bit of experience with these arrows? Suggestions? Thanks.

 

[JF_Idaho]

Sounds like you're right on the cusp. I ran 29.5 draw with 28.25 c2c arrow with 185 up front on a 300 with no issues.

 

[Live_weighT34]

Shot them in 2020. I’m a 30” draw and was shooting a Bowtech revolt X at 68lbs. I had cut my arrows down to 28.5” carbon to carbon with victory’s old stainless inserts at 75gr with a 100gr head. Total weight was 475 with a wrap and vanes. Stick with the 300s. I ran an archery shop for almost 6 years and despite the pros and manufacturers recommending going up in spine I found the opposite was true. 9/10 times I would get a better paper tune and broadhead flight being slightly under spined than over regardless of the bow I was tuning and my customers always said that they had better success set up that way.

 

[ResearchinStuff]

@Mighty Mouse can run the calculator, but my gut says 250s for you. I shot rip tko 300 spine, 70#, 28.5" draw, 150 gr up front 27.5" and get great flight, taw 434 gr.

 

[schur7559]

I run an identical set up- 70 lbs draw, 30.5” draw length with 29” arrows and 175 up front. The 250s fly great for me.

 

[Zac]

Just run the 250 it’s basically the same weight anyways.

 

[holmesac89]

Thanks guys! Really appreciate the feedback.

 

[5MilesBack]

I'd be interested to see exactly what their 300's and 250's actually come out to on a spine tester. I've never seen a company's series of arrows that have several different spines yet are so close to each other in regards to GPI weight. I find it weird that their 400's are 9.0gpi, and the 250's are 8.9gpi. I'd probably choose the 250's as well. You could try them out even a bit longer and see how they do, or keep cutting them back until they hit the sweet spot.

I shoot the 250's at 30" carbon to carbon, 200gr up front, 32.5" draw, at 71lbs. They shoot fine. I might have to try the 200's now that they've added those as an option.

 

[holmesac89]

I'd be interested to see exactly what their 300's and 250's actually come out to on a spine tester. I've never seen a company's series of arrows that have several different spines yet are so close to each other in regards to GPI weight. I find it weird that their 400's are 9.0gpi, and the 250's are 8.9gpi. I'd probably choose the 250's as well. You could try them out even a bit longer and see how they do, or keep cutting them back until they hit the sweet spot.

I shoot the 250's at 30" carbon to carbon, 200gr up front, 32.5" draw, at 71lbs. They shoot fine. I might have to try the 200's now that they've added those as an option.

Yeah I'm really confused by how little difference there is in their weights between spines too. I tried researching it a bit but didn't find much. It made me a little skeptical of choosing them at first, but it seems a lot of people really like them. I don't want to spend the money to fully start over with a 4mm setup either.

 

[Mighty Mouse]

Sorry I'm late to the party, but qSpine/OT2Go says "optimal" spine would be 279 for a typical hunting bow (340 fps IBO, 30" ATA, 6.5" BH, 80% LO) at 70#/30" shooting a 29" C2C arrow with 175 gr on the front and 30 gr on the rear. You'll be fine with 250 or 300 spine arrows. I would err on the stiff side.

 

[Mighty Mouse]

I've never seen a company's series of arrows that have several different spines yet are so close to each other in regards to GPI weight. I find it weird that their 400's are 9.0gpi, and the 250's are 8.9gpi. I'd probably choose the 250's as well.

I've wondered about that too. I'm guessing Victory varies the grade of carbon slightly between some of their spines. Using a higher modulus carbon for the stiffer spines could achieve the desired stiffness with minimal increase in gpi.

 

[holmesac89]

Sorry I'm late to the party, but qSpine/OT2Go says "optimal" spine would be 279 for a typical hunting bow (340 fps IBO, 30" ATA, 6.5" BH, 80% LO) at 70#/30" shooting a 29" C2C arrow with 175 gr on the front and 30 gr on the rear. You'll be fine with 250 or 300 spine arrows. I would err on the stiff side.
View attachment 724770

Thank you!

 

[eddiewiggles]

29.5 DL shooting 72ish lbs. 50 grain insert and 100 grain heads.

Have been shooting 250 spine TKO’s for 2 years now. I cant tell you how or why I ended up shooting 250’s but I’ve never had a reason to switch. They shoot and tune great for me


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[builtbybama16]

Not to hijack but I have a similar question. Can a 250 spine rip tko handle 345 up front? I’m a 29” draw at 83lb using an rx7. I currently have 250s with 310 up front, 27.5 c2c (ethics half out post and sleeve) but I’m considering going to a 28-28.5 with 345 up front to ditch the aluminum. What I have flies perfectly but will be too short for my new bow. It’s less a weight thing and more a repeatable results and durability thing.