Confused by bare shaft / broad head tuning results ... looking for some insight

2761 Views 42 Replies 26 Participants Last post by Adam634, 2 mo ago

jo3st3

Discussion Starter · 2 mo ago (Edited)

2

I've got two arrows that, according to Archers Advantage, should be a good fit, but the results are confusing. I'm hoping folks here can help me understand what's happening.

Easton Axis arrows, the bare shaft, fletched field point, and Magnus broadheads are all hitting consistently in a small group, broadheads out to 60 yards tested and right on target.

Then I switch to the Easton Sonic arrows, which I want to use for TAC, the fletched field point is right on the money, but the bare shaft at 30 yards is hitting high left... like 6 to 12 inches in the 10:30 position.

I don't get it. Is the lighter arrow just getting rag dolled out of the bow or over or under spined even though the chart says it's good? Does the lighter arrow weight exaggerate the bare shaft results? Is it the speed of the arrow, it doesn't have as much time to recover? I guess I don't get how the bare shaft can be so far off with the Sonic compared to what's happening with the Axis.

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Apollo 1

· #2 · 2 mo ago

Are they the same diameter? Bare shaft at 30 yds is a long shot/very sensitive.

Reactions: 2

jo3st3

Discussion Starter · #3 · 2 mo ago

Apollo 1 said:
Are they the same diameter? Bare shaft at 30 yds is a long shot/very sensitive.

Sonic is 6mm and Axis is 5mm

Daljwil

· #4 · 2 mo ago

jo3st3 said:
Sonic is 6mm and Axis is 5mm

That’s your answer. At 30 yards that MM of difference would be a lot with a bareshaft.

Reactions: 5

Uniquename

· #5 · 2 mo ago (Edited)

Maybe one click down on the arrow rest for the sonic arrow

Reactions: 1

jo3st3

Discussion Starter · #6 · 2 mo ago

Daljwil said:
That’s your answer. At 30 yards that MM of difference would be a lot with a bareshaft.

Really? I just think that's weird. Like the 55 grain difference with a big cam like the Mathews has, it's just getting slap happy with that light arrow. IDK. I've heard Mathews do better with a stiffer spine but the Axis isn't over stiff and flies great so 🤷‍♂️. I don't have different field point weight to experiment with, they're all 100 grains, but maybe that would reveal a spine issue

nickam9

· #7 · 2 mo ago

I’ve found that arrow tune can be so sensitive that I expect to retune when using a different arrow. A couple grains difference of using a lighted nock instead of your normal nock will screw up your turn. Two different arrows with different diameters and weight will definitely affect it.

Reactions: 4

Skyydyyver

· #8 · 2 mo ago

Those two arrow builds are pretty different and I would expect them to tune different because of it.
Foc, shaft length, arrow weight and size all different.
Size in itself make the skinnier arrow sit lower on you rest.
There's no way they would tune the same.
Bareshaft is just too sensitive to anything.
Plus it looks like archer's advantage is saying you are on the stiff end of acceptable with the axis and a smidge on the weak end of spine on the sonic.
I think it's amazing that the fletched both hit the same at 60.

Reactions: 4

Uniquename

· #9 · 2 mo ago

I bare shaft tuned yesterday to 60 yards , you have to be money from 30 yard's out .
That's with one size arrow, I could see it easily changing with 2 different size one's.

Daljwil

· #10 · 2 mo ago

jo3st3 said:
Really? I just think that's weird. Like the 55 grain difference with a big cam like the Mathews has, it's just getting slap happy with that light arrow. IDK. I've heard Mathews do better with a stiffer spine but the Axis isn't over stiff and flies great so 🤷‍♂️. I don't have different field point weight to experiment with, they're all 100 grains, but maybe that would reveal a spine issue

It’s not a weight thing it’s a diameter thing. Because the diameter of the arrows are different the rests relation to your nocking point is different between the two. Essentially Your arrow is coming off the rest different between the two arrows.

Reactions: 5

Daljwil

· #11 · 2 mo ago

I’m impressed you are hitting with a bareshaft that far to be honest, good shooting

Reactions: 1

jo3st3

Discussion Starter · #12 · 2 mo ago

Skyydyyver said:
Plus it looks like archer's advantage is saying you are on the stiff end of acceptable with the axis and a smidge on the weak end of spine on the sonic.
I think it's amazing that the fletched both hit the same at 60.

good point about diameter and arrow rest. Makes sense it would need to come down a little. It’s more the left miss that I’m a little surprised by.

Aa results are opposite, on weaker side with Axis and stiffer with Sonic

I hate to mess up the tune just to use this lighter arrow but it sounds like I’ll have to

Reactions: 1

Skyydyyver

· #13 · 2 mo ago

I'm jealous that you are going to a TAC. I wanted to go to the Terry Peak SD TAC because I worked there in 2004 and it would be cool to go back there for that.
Unfortunately TAC sells out there really fast and I was too slow!

kballer1

· #14 · 2 mo ago

Bow tuned for the Axis arrow BUT not the Sonic arrow. Sounds like the Axis is your hunting set up, so why would you want to change it for a weekend shoot which doesn't mean a thing.

Reactions: 3

1/2 Bubble Off

· #15 · 2 mo ago

jo3st3 said:
good point about diameter and arrow rest. Makes sense it would need to come down a little. It’s more the left miss that I’m a little surprised by.

Aa results are opposite, on weaker side with Axis and stiffer with Sonic

I hate to mess up the tune just to use this lighter arrow but it sounds like I’ll have to

If your bow is tuned for its primary purpose (filling the freezer), you have 2 options:

1) don't mess with the tune... Get a sight tape and get to prepping for TAC. A 6" difference at 30yds might look huge but in reality it's not too far off. You'll only be shooting field points and as long as you aren't trending L/R the further you shoot you'll be fine.

2) Mark the rest where it is now, bareshaft tune at 20 yards with the TAC arrows and call it good. Use the marks to get it back to where it tuned with your hunting arrows. IMHO, there's not much to be gained by bareshaft tuning beyond that.

Reactions: 3

reddogjack

· #16 · 2 mo ago

Hi,

tuned for one, doesn't mean tuned for another.

pick one !!

Reactions: 2

DuckFart

· #17 · 2 mo ago (Edited)

The arrow diameter is.moving the point up for certain, and if your rest is any half a hair left of center,.it is moving your point left. You have to adjust the rest to get back to what the bow wants on both axis.

KauaiWai

· #18 · 2 mo ago

Id like to add that archers adwantage is also your problem here.

Seth234

· #19 · 2 mo ago

jo3st3 said:
Really? I just think that's weird. Like the 55 grain difference with a big cam like the Mathews has, it's just getting slap happy with that light arrow. IDK. I've heard Mathews do better with a stiffer spine but the Axis isn't over stiff and flies great so 🤷‍♂️. I don't have different field point weight to experiment with, they're all 100 grains, but maybe that would reveal a spine issue

There’s NO SUCH THING as a certain bow just shoots overly stiff arrows or under spined arrows better. Every bow will shoot any arrow that is tuned. As far as the 5 and 6 mm arrows being different. The 6 mm has the point higher on the rest, so it’s naturally going to plane in that direction. Has nothing to do with the cams or anything else.

Reactions: 3

Mrcjd2001

· #20 · 2 mo ago

I have trouble tuning if archers advantage is on the weak side. My best results have been about where your axis are on their scale. Also agree with others about the difference in diameter.

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