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View Full Version : sudden 1 ft drop in arrow grouping



dzsmith
05-08-2012, 08:30 AM
so i was sighting in my 2011 exile with my new victory vap arrows, they only shot a little lower than my easton axis arrows so this was going to be a quick tune. i starting shooting and adjusted my sight as needed and was getting closer and closer to being dead on. all of a sudden my bow shot a foot low. so i immediately thought well it must be my for or the arrow. I shot another and another and the group was tight but 1 ft low. I have am axel armotech sight and i was simply micro adjusting it so there is not it could have slipped,plus it has numbers on the rail and i know where it was. i looked over my bow, and i do have some string wear from when i used to have the trg, but its always been that way. i tried adjusting my sight to its maximum limit completely bottomed out and it still shoots in the same place, a foot low. i adjust my sight in both directs up and down, and it still shoots very low with little change 3-4 inches up or down. what could of happened to cause this. im going turkey hunting in kansas next week, and i need to get this issue resolved before i go.

mdodraw29
05-08-2012, 09:10 AM
have you checked you arrow flight by paper tuning? and have you tried shooting at different distances?

Tosi
05-08-2012, 09:12 AM
I replaced my TRG/SOS on a 2011 ONZA and had to replace the string & cable due to stretching from the TRG system. This may not be your issue but when I replaced the Cable and String it was a huge difference in elevation. Recommend giving Hutch a PM and see if he can help ether with a recommendation and or possible a new set of custom string and cable. You may want to give Martin CS a call. Martin replaced my cable when I changed out my TRG and I use them as a back up.

bfisher
05-08-2012, 11:25 AM
More detail would be nice, but if this happened all of a sudden then I'm betting that if you use a drop away rest then the cord slipped up on the cable and the rest isn't coming up all the way. You can check this by drawing and holding while somebody tries raising the rest manually. Another thing that has happened to me one time was that a limb bolt loosened up as I was shooting and the bow started shooting about 8" low at 20 yards so check this.

Could be your nocking point or loop moved up the string and or the peep slid down. It only takes about 1/8" difference to make the arrow move a foot at 20 yards. Although it's never happened to me before I recently had issues with the peep sliding down, as much as 3/8" although it was/is served above and below. Apparently since I installed it I have added some twists to the string and the twists are tighter above the peep now which forces it to slide down. This is why it is important to, once the bow is tuned, measure these things with some reference on the bow. I like to measure down to the peep and nocking point from the top axle. Then if something moved a quick check can indicate the problem without having to tear my hair out (what little is left).

OK, another possibility. Broken strands in the string or a cable, causing the nocking point to change and/or the rest to not raise up all the way. Good indicator of this would be if the peep suddenly started turning.

wscywabbit
05-08-2012, 04:47 PM
More detail would be nice, but if this happened all of a sudden then I'm betting that if you use a drop away rest then the cord slipped up on the cable and the rest isn't coming up all the way. You can check this by drawing and holding while somebody tries raising the rest manually. Another thing that has happened to me one time was that a limb bolt loosened up as I was shooting and the bow started shooting about 8" low at 20 yards so check this.

Could be your nocking point or loop moved up the string and or the peep slid down. It only takes about 1/8" difference to make the arrow move a foot at 20 yards. Although it's never happened to me before I recently had issues with the peep sliding down, as much as 3/8" although it was/is served above and below. Apparently since I installed it I have added some twists to the string and the twists are tighter above the peep now which forces it to slide down. This is why it is important to, once the bow is tuned, measure these things with some reference on the bow. I like to measure down to the peep and nocking point from the top axle. Then if something moved a quick check can indicate the problem without having to tear my hair out (what little is left).

OK, another possibility. Broken strands in the string or a cable, causing the nocking point to change and/or the rest to not raise up all the way. Good indicator of this would be if the peep suddenly started turning.

Yep, after my bow is set up, I record the ATA, BH, Nock height, and Peep height on a paper I keep in my bow tackle box. I also mark the string where my peep and nock loop sits with a sharpie so I have a quick reference point in case something seems off. ;)

Speedykills
05-08-2012, 05:15 PM
I'm betting that if you use a drop away rest then the cord slipped up on the cable and the rest isn't coming


Ive had this happen more than once with same results your having.

droppixel
05-08-2012, 07:20 PM
Ive had this happen more than once with same results your having.

I had the same thing with my Apache last year, freaked me out and then I realized what it was.

dzsmith
05-10-2012, 09:16 AM
All good answers I've been busy separating from the military so I haven't had time to look into it yet , thanks for the support

bfisher
05-10-2012, 12:41 PM
All good answers I've been busy separating from the military so I haven't had time to look into it yet , thanks for the support

No sir. THANKYOU FOR YOUR SUPPORT!!!!!!!!

wscywabbit
05-10-2012, 01:40 PM
no sir. Thankyou for your support!!!!!!!!

^^^x2!!!!! :)

harrier
05-11-2012, 04:05 PM
no sir. Thankyou for your support!!!!!!!!
x3!

dzsmith
05-29-2012, 06:01 PM
so i finally took my bow to a dealer to help me out with the drop issue, well we discovered that the rest had slipped which we re adjusted and centered and we also discovered that the timing was off. well after all was said and done we paper tuned it real quick in the shop and it shot perfectly. then when i got home i put the ole rineheart about 20 yards out and fired some arrows, still a foot low. i do not know what to do. the sight is bottomed out, it cant go much lower. the rest and loop are all centered. there is no fletching contact. there is no cracks in the limbs and the limb bolts are fine, he and i both looked the bow over, the only possibility left is the strings which are severly worn from when i had my trg, but i will soon be getting new strings from hutch anyway, i hope this is the problem

elkslayer4x5
05-30-2012, 08:24 AM
Have you checked to see if the peep has moved?

Hutch~n~Son Archery
05-30-2012, 08:51 AM
Have you checked to see if the peep has moved?
You bet es! I would say that is probably the one thing people forget. General location of the peep should be 5.5 to 6.5 inches above the center of the d loop.


Hutch:cool:

Tosi
05-30-2012, 08:58 AM
Elkslayer: like I said early that I had the same issue when I replaced my TRG/SOS. The new string by Hutch helped the issue but is a slower set up. Had the same issue with the sight (Black Gold Rush). I replaced the sight with a new TRU-GLOW 5 pin Micro with rubber coating. This seemed to help as the sight arm is lower than the Rush so I wasn't bottomed out on the sight. Now saying all that; I was shooting Carbon Xpress Munity's and changed to the Easton Axis End-Fussed. Had the same issue as and both arrows are 420g +/- 1 or 2g. The Munity shot 6-8 inches lower at ever range from 30-70 yards. I'm sure that theirs some reasonable explanation that encompass arrow width, arrow balance and solar vectors of the moon. So don't feel alone, it bug the snot out of me. The new string/cable seemed to be the answer.