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Discussion Starter #1
So i'm thinking about revamping my competition setup. Bowtech Specialist, Limbdriver Micro Elite, and X Killers. I'm a little confused about X Killers. They are a 200 spine while I need a 350 spine and they weigh 9.5 gpi. The 150 gr points and adjustment points confuse me as well. It will be a super heavy shaft. Can anyone explain how this shaft works.
 

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Allows you to shoot a long arrow with a heavy point, my indoor arrows were like 30.5(28 dl.) inches with a 200 grain point. you can start with a couple shafts cut long and play with point weight and see how they shoot.

A long heavy shaft with a high foc. will be very forgiving and speed has zero advantage indoors. i remember one of the better shooters at our club, It looked like you could outrun his arrow on its way down range, but it usually found the x.
 

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Played with full length versions a while back, 150 gns up front.

I liked them, and plan on going back for my own at some point.

I (making the assumption here) would really recommend going to the 200 or 250 nibs if your shooting very low draw weight/length.



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They are big and fat!

I got some for my indoor league this year. I normally shot 400 spine vaps out of my bow. My X-Killers are full length with the 150gr tips. You might want to look at other tips for them, as I'm not that big of a fan of the razor pin tips. They end up bending easily, then you end up grinding them down slightly. Something a little more rounded might be more convenient.

Regardless, they shoot fine out of my bow. I've been playing around with X2 vanes in a 4 fletch on them, kicking around doing a 6 fletch with them, just because I can.
 

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Pretty much all of your super fat tourney shafts are going to be really stiff spined. You just need to find out how much point weight and shaft length brings it down into your spine range. FWIW Triple X's are a 150 spine, so the 200 spine X Killers won't take as much weight lol. I've got a couple dozen X Killers here at the shop if anyone needs some.
 

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the rule is that as diameter goes up, dynamic reaction to the compressive forces that bend the arrow are resisted faster (a higher cyclic value). so even with two "same static spine" arrows of different diameters, the larger diameter shaft will act stiffer on the shot. with that larger diameter shaft, more length and the resistance to accelloration of getting a heavier point moving quickly, will make the shaft bend easier, thus lowering the dynamic spine.
the grains per inch value is a good key....
if two shafts have similar diameters, the one with the lower grain per inch weight will bend easier , will require less point weight and /or less length to find the right combination to get the dynamic spine you need for your draw weight and length. it will also be the one with a lower static spine value.
static spine is the easiest method to measure the potential dynamic reaction (dynamic spine) by, because dynamic spine is proportional to static spine, but it takes lots of very expensive equipment to mesure. so arrow manufacturers rely on having a good idea of the typical draw weights being used, and build their shafts in a static spine value that will be tunable to the largest proportion of shooters given the point weights commonly available. it's also allot of them sell their own line of points to go with their shafts.
 

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Discussion Starter #7
Ok my i'm shooting 28/60. With the Overdrive Binary cam I can tune my shafts perfectly. How will these shafts papertune?
 

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Pretty much all of your super fat tourney shafts are going to be really stiff spined. You just need to find out how much point weight and shaft length brings it down into your spine range. FWIW Triple X's are a 150 spine, so the 200 spine X Killers won't take as much weight lol. I've got a couple dozen X Killers here at the shop if anyone needs some.
How much?

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Depends on which ones you are asking about. I have a dozen V1's and a dozen V3's
 

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I have shot them the gold tips and 2712's. This year I went with the black eagle magnums. I am shooting them full length with 120gr tips shooting 31 1/2" draw 50lbs on my supra. Do yourself a favor order BLACKEAGLES...........
 
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