Arrow speed testing

[Slick8]

I started out the day to simply chrono two different arrows with 100 & 125 grain field points (.400 Axis & FMJ's). This was to look at the differences between the 100 & 125 grain heads....well one thing led to another and the results are listed below.

I think I'll be ordering a set of 125 grain Ramcats, as you can see in the spreadsheet below with the Axis arrows FOC goes up considerably. At the same time the drop at 40 yards is not enough to worry about. It should be even less at 20 and 30.

I've been practicing since buying my PSE DNA with a 400 grain total weight Easton Axis Infused. I'm shooting 63 lbs at 29" averaging 295 fps. I then added a Nocturnal lighted nock which is 13 grains heavier than the standard nock.

I tested all arrows for speed with the nocturnal and have listed the results below. I lost 6-7 fps with the Nocturnal.

[Pullersboy]

very nicely done. good information.

[BIG BONE]

thx for sharing

[Physhstyx]

Your forgot to factor the " Computational Condensed Matter Physics"

This will greatly effect the flight and stability of said arrow.

Physh.

[Skullworks52]

so the top group of arrows are what gr. tip?

[ItsLeo]

The speed loss of going from a 100 to a 125 grain head is not nearly as significant as it used to be. Today's bows are much faster than bows of just 10 years ago.

The original reason for the lighter heads was to get a little speed increase. Back when it was needed it was a good compromise.

Nowadays I'll take a much stronger 125gr head, more energy, more FOC and more momentum over an insignificant speed gain.

[Slick8]

so the top group of arrows are what gr. tip?

The top group is the 414 grain Axis arrow with a 100 grain tip, the lower group is the same arrow weighing 432 grains with a 125 grain tip at 282 FPS.

If the 125 groups good in the Ramcat then I'll be shooting it this season. I'm a bit worried about being Under Spined for a 125 grain BH but we shall see.

[Daniel75]

The speed loss of going from a 100 to a 125 grain head is not nearly as significant as it used to be. Today's bows are much faster than bows of just 10 years ago.

The original reason for the lighter heads was to get a little speed increase. Back when it was needed it was a good compromise.

Nowadays I'll take a much stronger 125gr head, more energy, more FOC and more momentum over an insignificant speed gain.

Yeah, I'll bet I wasn't even getting 200 fps with my PSE Thunder Flite Express from the early 90's, my XX75 auminum shafts and Thunderhead 125's. Sad thing is, with all that weight, that bow was STILL loud

[ItsLeo]

The top group is the 414 grain Axis arrow with a 100 grain tip, the lower group is the same arrow weighing 432 grains with a 125 grain tip at 282 FPS.

If the 125 groups good in the Ramcat then I'll be shooting it this season. I'm a bit worried about being Under Spined for a 125 grain BH but we shall see.

Well you got at least 3 pounds you can turn it down if the arrows are underspined with the 125's. Broadhead tuning will tell the tale. You may be surprised at how much better it shoots then.

[Slick8]

Yeah that's a thought, I can drop a few pounds and hopefully not give up much if any FPS.

Hope to keep it right as is though.

[JW]

The top group is the 414 grain Axis arrow with a 100 grain tip, the lower group is the same arrow weighing 432 grains with a 125 grain tip at 282 FPS.

If the 125 groups good in the Ramcat then I'll be shooting it this season. I'm a bit worried about being Under Spined for a 125 grain BH but we shall see.

You will be fine. You also stiffened the spine a tad adding the nockturnal. Worst case will be dropping a couple pounds but with a 28 inch arrow I doubt it. I shoot a 27" 400 with 125's up to 62 pounds and no part of it shows under spine when tuning.

[Swat791]

Shoot arrows through paper with both the 100 and 125 grain tips.
Changing the tip will change the arrow spine and possible throw things off. Paper tune to see what the arrow is doing after as it leaves the bow.

Easton Tuning Guide

Personally, my bow shoots better with a little stiffer arrow and bullet holes through paper.

[Mudslinger]

To heck with paper tuning. Do a walk back tune and the BH tune and see what it does. You should be able to get a bullet hole by varying the distance you stand from the paper. You should be good to go on spine, especially with the 340's.

[JW]

To heck with paper tuning. Do a walk back tune and the BH tune and see what it does. You should be able to get a bullet hole by varying the distance you stand from the paper. You should be good to go on spine, especially with the 340's.

Yep. To hell with paper.

I mean, to heck with paper.

[Swat791]

Use a the laser center tool and line everything up before shooting an arrow.
I've used the laser then paper tuned (at 6') and both field points and BH impact the same spot. Adjust sights and go hunt.