Spine of the Easton XX75 1918 shaft

Motto · Post by **Motto** » Thu May 05, 2005 5:07 pm

Hello,

Do you guys know what is the spine of the Easton XX75 1918 shaft? Obviously, Easton do not manufacture these shafts any more. So, I can not find their spine value from the Easton catalog. I do know that the weight of this shaft is 11.58 grains per inch.

With this shaft I could get enough weight to shoot with a 150 pound recurve crossbow. Also, the aim is that the smaller outer diameter could be advantageous. However, I am not sure if the shaft will be stiff enough to shoot properly and safely. What do you think?

Thank you,
Regards,
Motto

Digger · Post by **Digger** » Thu May 05, 2005 5:46 pm

I think that the shaft lacks the diameter to be used in an Excalibur bow of any weight it will sit too low in the trough for the top held string to hit the back of the bolt properly and will throw off your accuracy. I don't think the excal people would recommend them either.

Digger

Woodsman · Post by **Woodsman** » Thu May 05, 2005 10:01 pm

.21 to .23 dia. is in the recommended ranges.

DOXNUT · Post by **DOXNUT** » Thu May 05, 2005 10:03 pm

You wouldn't catch me, trying that kind of experiment! There are limitations to experimenting in this world, stick to the company minimums.

Beaver · Post by **Beaver** » Thu May 05, 2005 11:44 pm

Motto

Excalibur recommends a series 22 carbon, a 2213, 2216, or 2219 aluminum. These shafts have an outside diameter of .34375 inch. A 1918 shaft would have a diameter of .296875. That is a rather large difference. This could cause some serious problems. I don't know if it would happen, but, if the string should somehow get over the shaft because of the small diameter :twisted

Motto · Post by **Motto** » Fri May 06, 2005 2:13 am

Hello,

Thank you for the answers. I do not have Excalibur bow. With my bow the problem is not that the string will hit over the shaft. The question is, in general, that is 14 inches long 1918 shaft stiff enough to shoot with 150 pounds bow? However, the inner thickness of the shaft is quite big.

Thank you,
Best regards,
Motto

Woodsman · Post by **Woodsman** » Fri May 06, 2005 7:14 am

Beaver, I had heard repeatedly that the first 2 numbers on the shaft corresponds to the outside diameter in 1/100'ths of an inch. However, I just went to measure my shafts and they are exactly what you are saying.

Therefore my above statement is not quite correct. It should read any shafts with a 21, 22, 23, as first two numbers will work and are within the recommended ranges, with 22 being the ideal.

Jim C · Post by **Jim C** » Fri May 06, 2005 8:12 am

Its stiff enough. spine is not particularly relevant on TRACKED crossbows.

I shoot 1714 out of a Barnsdale limbed Australian contender and Laser II out of a POint blanc with the same draw weight. now the laser II have at least a 400 spine (and cut short way above that) and the 1714 is much less.

I have shot 2219, 2315, down to 2012 out of a point blanc. and as light as a 2212 with heavy points out of a 165 excalibur.

bj · Post by bj » Fri May 06, 2005 11:06 am

it's plenty stiff enough (which doesn't really come into play when you consider the spine of a 2213...)..as far as shooting them, i shoot cutdown goltip hunter and xt vertical arrows from my point blanc...they are measuring the equivalent of a 19 + series shaft...i've shot thousands of these will no ill effects...i've even shot them from my vixen with a heavier point...the only difference is that the poi is a little lower...sometimes we get a little hung up on what is "recommended" and what will actually work just fine...i always love it when you get into some of these discussions with a lot of manufacturers as to what they recommend vs what will actually work just fine as compared to what they themselves have tested...a prime example is a maxzone scope...the scope was designed to be sighted at 20 yards on the crosshair...sighting the crosshairs at 30 yards will not work as per the manufacturers recomendations right ?...of course it will...it's not the tried tested and true method, but yes it will still work...(i can still see out of mine ???)

Motto · Post by **Motto** » Fri May 06, 2005 12:20 pm

Hello,

Thank you guys for the answers. So, do you think that even 1816 shaft could be fine for the 150 pounds recurve bow with ten inch powerstroke? Of course, the weight should be high enough.

Thank you,
Regards,
Motto

GaryL · Post by **GaryL** » Fri May 06, 2005 3:53 pm

Motto wrote:Hello,

Thank you guys for the answers. So, do you think that even 1816 shaft could be fine for the 150 pounds recurve bow with ten inch powerstroke? Of course, the weight should be high enough.

Thank you,
Regards,
Motto

Would stop at 19, 18 may be cutting it too close....