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Tac15i accuracy and consistancy problems

 
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  #1  
Old 10-09-2011, 03:09 PM
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Join Date: Jan 2008
Location: North east Pa.
Posts: 100
Tac15i accuracy and consistancy problems

I'm having accuracy and consistancy issues with my new Tac15i. And yes I know how to adjust for parallex. Shooting at 30 yards, I'll adjust parallex and it will shoot good for 5-8 arrows, 1" group, then the very next arrow the group will shift 4-6" in another area and it will continue to group well there until about the 6th arrow where it will shift again. Im pulling my hair out with this bow. Everything is tight, rest, limbs, bolts, scope, etc. I did notice the UTG scope that came with it, the adjustment bottoms out when i try to use the upper mil-dot at 30 yards and it tops out when i try to use the crosshairs for a 30 yard zero. It seems as though there should be more adjustment in this scope than this. Anyone else having similar issues with this bow/scope? I purchased this in order to extend my range but it does me no good if I cant hit anything past 40 yards. My $250 Horton is more accurate. I'll be swapping the scope as soon as my new arrows arrive, I've lost 2 already with this problem, to see if it is actually the scope. Any help will be greatly appreciated.

Quote:
Hello, this is Len.

Since this is quite a long topic I thought I'd post a follow-up comment from shooter981, the original poster.

============================================
UPDATE: I purchased this crossbow from Len. I relayed the info from here to him and stated that I thought the limbs were failing and were the reason for the accuracy problems. He had me return the limb assembly to him and they replaced the limbs on warranty. He was great, no hassle what so ever and I had my limb assembly back in under seven days, including ship time!!! I'm happy to report the crossbow shoots unbelievable now. I've had it out to 80 yards so far and I have to shoot seperate dots on my target so as not to damage my arrows!!! I need to thank Len and Andy for taking care of this without hassle and in a very very timely manner so I can get back out into the woods. THANK YOU!!!

Last edited by Len Backus; 04-07-2012 at 11:08 AM.
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  #2  
Old 10-09-2011, 07:12 PM
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Join Date: Aug 2011
Posts: 9
Re: Tac15i accuracy and consistancy problems

Hey shooter981,
I know exactly what you are going through. I just sent a message to xbow755 earlier today asking him if he had this issue, and how he dealt with it if he did have that problem. To start with, I paper tuned the bow with an arrow with no fletching until I was getting bullet holes. I only used 1 arrow over and over to acomplish this. I then proceeded to install my scope on my HHA Optimizer. I knew from reading the posts on the forums that the scope would have to be shimmed in the front in order to have the cross hairs be zeroed at 20 yards. The shim IMHO is needed whether you use an Optimizer, or just a scope on the rail. This will allowyou to set the elevation, and windage on your scope to the mid point in both directions to start your zero in at 20 yards. ( I learned from trial and error when I first purchased the xbow that when trying to lower my scope to zero in at 20yds the windage became very limited in adjustment.) I am very particular to crank the bow back just barely enough to have the release sled fall into the slots. I have also insured that the cranking string knot was sitting flush in the cranking drum. This prevents string jump and ensures a level wind keeping equal pressure on the cranking sled.I have been setting up my targets at many distances to plot out a sight tape for my Optimizer, and I notice the same thing as you are referring to. I will have 4, 5, 6, even 8 arrows fly good, then I will have a few flyers. I am using 3 arrows to sight in with. The thinking is that you use only one arrow to ensure repeatability, but I have a hard time believing that all 3 arrows will fly so perfect then all 3 arrows will fly off my mark by 3 or 4 inches at 50 or 60 yards. I am shooting off a very good gun rest (tripod and sand bags) with no wind while sighting in. The table I am using is made out of heavy galvanized steel which does not move. I have yet to figure it out, and it is making me very nervous to hunt with this bow when there is a possibility that the arrow will be a flyer. The only thing I have not done is index my arrows. But like I said the 3 arrows will fly perfect then at a random time fly way off mark. Maybe someone has had this happen and knows what to do.

Last edited by msd4141; 10-09-2011 at 08:42 PM.
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  #3  
Old 10-09-2011, 07:47 PM
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Join Date: Aug 2010
Posts: 142
Re: Tac15i accuracy and consistancy problems

Quote:
Originally Posted by shooter981 View Post
1" group, then the very next arrow the group will shift 4-6" in another area and it will continue to group well there until about the 6th arrow where it will shift again. ... I'll be swapping the scope as soon as my new arrows arrive, I've lost 2 already with this problem, to see if it is actually the scope.
Based on a similar "shift again" exasperating <insert bad language here> experience with a well-known, big-buck brand of rifle scope on a deer rifle, I would definitely would try a different scope.

Thinking positively: Even if swapping the scope does not solve the problem, you will have made progress towards resolving your problem, since you can now eliminate the scope as the cause.

Oh, and don't make the mistake I made. Swap the current scope with a different brand scope you know is rock-solid. My mistake was swapping the scope out with the manufacture's replacement, which failed in the same exact manner after about 20 rounds.

Please, let us know what you find.
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  #4  
Old 10-10-2011, 07:33 PM
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Join Date: Jan 2011
Posts: 54
Re: Tac15i accuracy and consistancy problems

I was having similar problem with my setup two weeks ago (Right before one of the limbs started separating) I would shoot about 6 arrows and some would be grouped in one spot and the rest about 6" lower. (both groups would be about 1" at 40yards). My initial thought (and is still my #1 guess is the scope), I do not think it is that high a quality of scope to begin with (Based on the problems I had with the battery compartment) When I get the xbow back from the shop and I re-tuned/sighted it in I will have to test again and hopefully it goes away, but I'm not counting on it.

WildWillie
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  #5  
Old 10-10-2011, 10:00 PM
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Join Date: Mar 2011
Posts: 4
Re: Tac15i accuracy and consistancy problems

I had the same issue the 1st time a limb split. I tried everything I could think of; scope first, pron square with rail, cam level and clearance, string mark alignment, bow/scope level, biscuit and D-loop alignment. Just couldn't set the scope because shot placement was inconsistent (4 to 6 inches off in random directions).

Check your limbs very carefully for spintering or "hangnails", use your "best" arrow for tuning (and hope it doesn't swallow the nock before you've finished).
GOOD LUCK!
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  #6  
Old 10-11-2011, 04:45 AM
Silver Member
 
Join Date: Jan 2008
Location: North east Pa.
Posts: 100
Re: Tac15i accuracy and consistancy problems

What kind of a piece of crap did I buy that the limbs split after 20 shots???!!! Ill check the limbs today but I can say that I can hear cracking/popping noises when the bow is cocked. Don't know if that's normal. I know my Matthews doesn't do that, or my Horton.
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  #7  
Old 10-11-2011, 07:03 AM
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Join Date: Mar 2008
Location: North Vernon, in
Posts: 267
Re: Tac15i accuracy and consistancy problems

please let us know what the out come of this is because i am planning on buying one this winter after Jan. and i had it down to two x bows the tac 15 or the Excalibur and i know that the Excalibur is a great x bow
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