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Why would a fixed broad head shoot low? #5962232 10/05/15 07:46 PM
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spro Offline OP
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Son did some target practice before the hunt saturday with his new fixed broad heads and was hitting the target 6 inches low and 3 inches to the left every time. Field tips were dead on every time. He is pulling back 45 lbs. Field tips and fixed broad heads were both 85 grain. Made a quick dash to the archery shop and picked up a pack of 85 grain mechanicals and now hitting the target. Don't recall the brand of either one. Has anyone else experienced being off that much with fixed vs. mechanical? What could be the cause of this? While picking up the new mechanicals the tech looked over the bow and said everything looks good. Got his 1st pig Saturday evening so the new mechanicals worked great.

Re: Why would a fixed broad head shoot low? [Re: spro] #5962268 10/05/15 08:05 PM
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The bow is not tuned, fixed blades will show you if your bow is not set up right. There are many things that could be causing this. What type of bow is it? Just to list a few, the rest might not be aligned right, knock point may be high or low, cam lean at full draw, the list goes on.

Re: Why would a fixed broad head shoot low? [Re: spro] #5962278 10/05/15 08:09 PM
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Re: Why would a fixed broad head shoot low? [Re: spro] #5962315 10/05/15 08:25 PM
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Thanks. Didn't know about tuning for broadheads. Guess I need to take it in again for tunning or just stick with the mechanicals. Bow has been tunned before. Tech looked it over and said all was good before we bought the mechanicals.

Re: Why would a fixed broad head shoot low? [Re: spro] #5962444 10/05/15 09:26 PM
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I would stick to fixed on 45lb draws. A good two blade would be perfect


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Re: Why would a fixed broad head shoot low? [Re: spro] #5962494 10/05/15 09:51 PM
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Why is that? Are mechanicals less effective at lower draw weights? He is shooting accurate with the mechanical. Would a fixed 2 blade fix the drop problem that exists with a fixed 3 blade?

Re: Why would a fixed broad head shoot low? [Re: spro] #5963161 10/06/15 02:54 AM
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Originally Posted By: spro

Tech looked it over and said all was good before we bought the mechanicals.
I'd like to know how he could tell it was tuned by just looking at it!!! confused2
At 45lbs., the reason he needs fixed heads is because he needs all the energy he can get for penetration.
Mech. takes up some of the energy to open the blades, resulting in less penetration.

Re: Why would a fixed broad head shoot low? [Re: spro] #5963188 10/06/15 03:05 AM
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Look at it like this. A tuned bow is pushing directly straight and centered on the arrow resulting in straight flight and maximum energy transfered into that flight and by extension resulting in maximum penetration. An untunded bow is pushing on the arrow slightly indirectly resulting in the back of the arrow starting off out of line and the fletching creating the drag to straighten it out. Now with field points or mechanical heads there is not tiny vane or wing on the front of the arrow working as a rudder. Those blades don't act as a rudder if they start out of a well tuned bow because they aren't starting off out of line. But with a bow that isn't well tuned those blades cause front end torque and the arrow flight is like a screw motion. Resulting in poor placement and penetration. Does that make sense to anyone but me?


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Re: Why would a fixed broad head shoot low? [Re: spro] #5963299 10/06/15 04:54 AM
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Makes sense to me Passthru, that was one of the points I was about to bring up

When the bow Is not tuned so the arrow Is not flying straight even with good poundage for a mechanical it will not penetrate as far as an arrow from a tuned bow, there will be lots more drag slowing the arrow down from friction on the shaft of the arrow.

There are lots of "bowtechs" working that would never touch my bow, at big box stores and "Pro-Shops".

cmorsch gave a short list and there are several other things that could be added.


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Re: Why would a fixed broad head shoot low? [Re: spro] #5963606 10/06/15 02:21 PM
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Makes a lot of sense now. Will be broadhead tuning his bow as soon as I can.
So if he is shooting low and left with broadheads I need to adjust the arrow rest up and right correct?
Thanks for all the great responses!

Re: Why would a fixed broad head shoot low? [Re: spro] #5963625 10/06/15 02:30 PM
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Yes and make small adjustments. Anyone who tells you your bow is tuned without shooting it doesn't know what they are doing.

Re: Why would a fixed broad head shoot low? [Re: spro] #5965238 10/07/15 03:04 AM
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Nock high.


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Re: Why would a fixed broad head shoot low? [Re: spro] #5965753 10/07/15 03:05 PM
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If your going to shoot fixed blade shoot the Slick Trick, best fixed blade shooting BH on the market only drawback cutting diameter. Take it for what it's worth some BH can't be tuned! My Matherws is tuned, Rage flys perfect, slick trick perfect, montec perfect, Muzzy low right. You tell me, just does! In my opinion at 45# go get the Slick Trick over 50# Rage two blade.



Re: Why would a fixed broad head shoot low? [Re: spro] #5965761 10/07/15 03:10 PM
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Re: Why would a fixed broad head shoot low? [Re: spro] #5965869 10/07/15 04:21 PM
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Originally Posted By: spro
Why is that? Are mechanicals less effective at lower draw weights? He is shooting accurate with the mechanical. Would a fixed 2 blade fix the drop problem that exists with a fixed 3 blade?


Accuracy is bow tuning and form
Broadhead accuracy is bow tuning
Penetration is blade angle and cutting diameter (assuming bow is in tune)

Mechanicals as a majority have large cutting diameter and flatter blade angle, toss in the loss of energy to open it and you are better off with fixed on lower poundage bows.

Another thing to think about is likely hood of a passtru. Fixed will continue to cause damage.


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Re: Why would a fixed broad head shoot low? [Re: spro] #5966110 10/07/15 06:40 PM
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As said above, if a field tip shoots great and a fixed blade broadheads shoots different it's all about tuning/ timing. My wife shoots a bowtech fuel @42lbs with a 350gn arrow. Now we shoot the wacem 3 blade. But she stacks dimes out to 50 yards with either her field point or broadhead, she can't shoot at the same spot cause she will be splitting arrows . But I tune my bows to perfection! I've never had a problem with my broadheads shooting different. Take it to a shop and check your timing get everything squared and shoot it through paper!


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Re: Why would a fixed broad head shoot low? [Re: spro] #5969432 10/09/15 05:23 PM
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after paper tuning do a walk back tune or modified french tune. paper tuning is great. i do it all the time, but to me its like bore sighting a scope. you need to take it one step further and fine tune the rest to get fixed blade bh to fly great.
look into the magnus line up for a low energy set up to increase penetration.

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