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Old 06-18-2019, 08:51 AM   #101
Low Fence
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Speed at distances could due to energy being used in trying to gain control. But at launch point, probably not measurable with any standard chrono.
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Old 06-23-2019, 08:07 PM   #102
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Probably. Iíve got his setup at 254 fps.
What calculator did you use?
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Old 06-25-2019, 06:59 PM   #103
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What calculator did you use?
Just common sense bow math. Creed has an IBO rating of 328. At 50 lbs, that IBO rating is 320. You lose 4 fps IBO per 10 lbs. So, we start at 320, and since you have a 28Ē DL, we subtract 10 FPS per inch, so weíre now at 300 fps. Peep and loop cost app. 7 FPS, so now, weíre at 293. Every 30 grains of arrow weight cost app. 10 FPS. Your arrow weighs 118 grains over 250, (IBO for a 50 lb bow), so, rounding up, 120 grains costs 40 FPS. Weíre now at 253 fps. Of course, that is assuming that your Creed actually hits IBO speed.
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Old 06-25-2019, 07:58 PM   #104
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Quote:
Originally Posted by rocky View Post
Just common sense bow math. Creed has an IBO rating of 328. At 50 lbs, that IBO rating is 320. You lose 4 fps IBO per 10 lbs. So, we start at 320, and since you have a 28Ē DL, we subtract 10 FPS per inch, so weíre now at 300 fps. Peep and loop cost app. 7 FPS, so now, weíre at 293. Every 30 grains of arrow weight cost app. 10 FPS. Your arrow weighs 118 grains over 250, (IBO for a 50 lb bow), so, rounding up, 120 grains costs 40 FPS. Weíre now at 253 fps. Of course, that is assuming that your Creed actually hits IBO speed.
Just trying to learn something here.. if ibo is at 30 inches 70 lbs if you shoot over 70 do u add ?
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Old 06-25-2019, 08:06 PM   #105
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Just trying to learn something here.. if ibo is at 30 inches 70 lbs if you shoot over 70 do u add ?
On the IBO rating, I donít really know?? But, every pound should give you 2 fps of arrow speed, until you hit a point of diminishing return, OR, your cam advancement increases DL.
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Old 06-25-2019, 08:07 PM   #106
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On the IBO rating, I donít really know?? But, every pound should give you 2 fps of arrow speed, until you hit a point of diminishing return, OR, your cam advancement increases DL.
Ok I didn't know how it worked . Thanks for the info..
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Old 06-25-2019, 08:47 PM   #107
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I think it's about time to unveil my new ultralight 100% FOC setup...

It's gonna be revolutionary!
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Old 06-25-2019, 09:20 PM   #108
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I think it's about time to unveil my new ultralight 100% FOC setup...



It's gonna be revolutionary!


Goood stuff


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Old 06-26-2019, 09:43 PM   #109
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Quote:
Originally Posted by rocky View Post
Just common sense bow math. Creed has an IBO rating of 328. At 50 lbs, that IBO rating is 320. You lose 4 fps IBO per 10 lbs. So, we start at 320, and since you have a 28Ē DL, we subtract 10 FPS per inch, so weíre now at 300 fps. Peep and loop cost app. 7 FPS, so now, weíre at 293. Every 30 grains of arrow weight cost app. 10 FPS. Your arrow weighs 118 grains over 250, (IBO for a 50 lb bow), so, rounding up, 120 grains costs 40 FPS. Weíre now at 253 fps. Of course, that is assuming that your Creed actually hits IBO speed.
Why would you decrease the IBO speed? The calculator doesn't call for that. The calculator I used was very close to what I shot through the chrono.


Interesting.
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Old 06-26-2019, 10:15 PM   #110
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Originally Posted by lovemylegacy View Post
Why would you decrease the IBO speed? The calculator doesn't call for that. The calculator I used was very close to what I shot through the chrono.


Interesting.
Iíve only been selling bows and using manufacturerís data for 18 years, so Iím no expert. Iíll give you back your 8 FPS. Youíre now st 261 FPS. Assuming your bow hits IBO. Not many bows do. Why donít you go to a reputable archery shop, weigh your bow and arrow, shoot through a good chronograph, and get back to us? I may start grabbing Creeds as fast as they come up for sale if they can do those numbers.
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Old 06-26-2019, 10:20 PM   #111
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Quote:
Originally Posted by lovemylegacy View Post
Why would you decrease the IBO speed? The calculator doesn't call for that. The calculator I used was very close to what I shot through the chrono.


Interesting.
Iíve only been selling bows and using manufacturerís data for 18 years, so Iím no expert. Iíll give you back your 8 FPS. Youíre now st 261 FPS. Assuming your bow hits IBO. Not many bows do. Why donít you go to a reputable archery shop, weigh your bow and arrow, shoot through a good chronograph, and get back to us? I may start grabbing Creeds as fast as they come up for sale if they can do those numbers.
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Old 06-27-2019, 09:05 AM   #112
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Quote:
Originally Posted by lovemylegacy View Post
Why would you decrease the IBO speed? The calculator doesn't call for that. The calculator I used was very close to what I shot through the chrono.


Interesting.
Because when you use limbs that are 10 lbs lighter than the IBO standard you have to derate the IBO rating, so you go from an IBO rating of 328 to 320.

No matter the terminology, a 60 lb limb isn't going to be as fast as a 70 lb limb out of the same bow, so you must correct for that.

Even if the calculator doesn't call for that specifically (derated IBO), it should be doing the math; if it isn't the numbers will be wrong.
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Old 06-27-2019, 01:47 PM   #113
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Quote:
Originally Posted by lovemylegacy View Post
Why would you decrease the IBO speed? The calculator doesn't call for that. The calculator I used was very close to what I shot through the chrono.


Interesting.
Your whole problem is this "calculator" thing. Anytime I hear the word" calculator" that's an immediate red flag IMO.
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Old 06-27-2019, 08:05 PM   #114
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Quote:
Originally Posted by Rat View Post
Because when you use limbs that are 10 lbs lighter than the IBO standard you have to derate the IBO rating, so you go from an IBO rating of 328 to 320.

No matter the terminology, a 60 lb limb isn't going to be as fast as a 70 lb limb out of the same bow, so you must correct for that.

Even if the calculator doesn't call for that specifically (derated IBO), it should be doing the math; if it isn't the numbers will be wrong.
gotcha
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Old 07-06-2019, 09:02 PM   #115
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Quote:
Originally Posted by rocky View Post
Iíve only been selling bows and using manufacturerís data for 18 years, so Iím no expert. Iíll give you back your 8 FPS. Youíre now st 261 FPS. Assuming your bow hits IBO. Not many bows do. Why donít you go to a reputable archery shop, weigh your bow and arrow, shoot through a good chronograph, and get back to us? I may start grabbing Creeds as fast as they come up for sale if they can do those numbers.
I suppose weíll never know about this bow for sure.
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Old 07-06-2019, 10:09 PM   #116
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Been trying to stay out of this thread, but I'm compelled to point out that my 67-lb recurve -- while much slower than any of the compounds discussed above -- worked pretty well to propel a 680-grain arrow (maybe 190 FPS) through the vitals of a 238-lb boar for a 100 yard track.
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Old 07-08-2019, 12:15 PM   #117
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Been trying to stay out of this thread, but I'm compelled to point out that my 67-lb recurve -- while much slower than any of the compounds discussed above -- worked pretty well to propel a 680-grain arrow (maybe 190 FPS) through the vitals of a 238-lb boar for a 100 yard track.
Exactly, after shooting a strugglestick for the past few years ALL compounds are blazing..haha
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Old 07-08-2019, 06:30 PM   #118
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I suppose weíll never know about this bow for sure.
Well, other than you actually being there when I shot it, I guess not. I was satisfied with its performance. I have laced several Whitetails with it, one this year that just boggled my mind. Been going to the same shop for a long time. Unless I "miss" entered a input on the Chrono(which is possible), it is accurate.
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Old 07-08-2019, 10:28 PM   #119
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Originally Posted by lovemylegacy View Post
Well, other than you actually being there when I shot it, I guess not. I was satisfied with its performance. I have laced several Whitetails with it, one this year that just boggled my mind. Been going to the same shop for a long time. Unless I "miss" entered a input on the Chrono(which is possible), it is accurate.
Iíll concede. You have the most efficient bow in the history of compound bows. Congrats.
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Old 07-09-2019, 04:22 AM   #120
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Iíll concede. You have the most efficient bow in the history of compound bows. Congrats.
Aww now, don't be like that, we just having a friendly discussion. Please don't get upset over this.
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Old 07-09-2019, 06:47 AM   #121
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aww now, don't be like that, we just having a friendly discussion. Please don't get upset over this.
👍😁
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Old 07-13-2019, 07:44 PM   #122
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Sorry for the hijack, didn’t want to flood the pages with a similar question.

Ordering new arrows and want to balance speed and weight. Currently shooting 27” 6mm Axis 340 with 50gr of brass roughly 460gr with a lighted nock on the back. Tried going to 75gr extra up front but it caused erratic arrow flight. Want an arrow that can pull double duty for hunting and 3D.
Have been really happy with the 6mm Axis arrows so was probably going to stick with them, but wanted to see if I there would be considerable difference going to a 300 shaft with 75gr of brass pushing arrow weight closer to 500gr?

Bow specs- Triax 28.5dl draw weight was at 65lb but turned it up a turn on both limbs.

Thanks in advance
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Old 07-14-2019, 08:07 AM   #123
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Originally Posted by QACZ71 View Post
Sorry for the hijack, didnít want to flood the pages with a similar question.

Ordering new arrows and want to balance speed and weight. Currently shooting 27Ē 6mm Axis 340 with 50gr of brass roughly 460gr with a lighted nock on the back. Tried going to 75gr extra up front but it caused erratic arrow flight. Want an arrow that can pull double duty for hunting and 3D.
Have been really happy with the 6mm Axis arrows so was probably going to stick with them, but wanted to see if I there would be considerable difference going to a 300 shaft with 75gr of brass pushing arrow weight closer to 500gr?

Bow specs- Triax 28.5dl draw weight was at 65lb but turned it up a turn on both limbs.

Thanks in advance
The best thing todo is see if you can get your hands on just a couple of 300 spine arrows and test. But if you added weight and The 340 went bad then yes you will see the difference going to a 300.
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Old 07-14-2019, 09:03 AM   #124
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I’ve got my arrow weight figured up around 415 grains, shooting just over 70# on a Halon at 29.5DL and shot 301 FPS through a chrono.

Does that sound reasonably correct?
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Old 07-14-2019, 09:09 AM   #125
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Quote:
Originally Posted by QACZ71 View Post
Sorry for the hijack, didnít want to flood the pages with a similar question.

Ordering new arrows and want to balance speed and weight. Currently shooting 27Ē 6mm Axis 340 with 50gr of brass roughly 460gr with a lighted nock on the back. Tried going to 75gr extra up front but it caused erratic arrow flight. Want an arrow that can pull double duty for hunting and 3D.
Have been really happy with the 6mm Axis arrows so was probably going to stick with them, but wanted to see if I there would be considerable difference going to a 300 shaft with 75gr of brass pushing arrow weight closer to 500gr?

Bow specs- Triax 28.5dl draw weight was at 65lb but turned it up a turn on both limbs.

Thanks in advance

Iíve got a few 300 spine Full Metal Jackets you can have to play around with. If you interested just pm me.
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Old 07-14-2019, 10:36 AM   #126
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The best thing todo is see if you can get your hands on just a couple of 300 spine arrows and test. But if you added weight and The 340 went bad then yes you will see the difference going to a 300.
It was ok through paper but was oscillating in flight. Didnít know if some other had some similar ďdemandsĒ and had better luck with a heavier weight combo. Understand itís not needed to kill foam but donít want two sight tapes and arrows like to practice how I hunt as well.

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Iíve got a few 300 spine Full Metal Jackets you can have to play around with. If you interested just pm me.
PM sent thank you!
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