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hha vertical asjustment

 
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  #1  
Old 09-30-2011, 04:06 PM
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Join Date: Sep 2011
Posts: 24
hha vertical asjustment

I am trying to zero at 20 yards and have run out of vertical adjustment. I am 2 1/2 inches high and can't lower the scope any more. I called tech support and they told me to lower my rest. I have already paper tuned the bow and explained that lowering the rest would take it out of tune. He told me that is what other tac 15i owners are doing but I haven't seen any postings to support that.

Any other suggestions?

Waiting for a call from HHA to further address my issues.

Last edited by Luv2turn; 10-01-2011 at 03:27 PM. Reason: additional info
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  #2  
Old 09-30-2011, 04:13 PM
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Join Date: Jan 2011
Posts: 54
Re: hha vertical asjustment

I put shims under the scope on the front mount. I was almost 5" high at 20yds

WildWillie
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  #3  
Old 09-30-2011, 06:26 PM
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Join Date: Aug 2011
Location: Auburn, PA
Posts: 12
Re: hha vertical asjustment

I lowered the biscuit quite a bit to sight in the scope ( it was hitting over 8" high with no more vertical adjustment left). It was the only option available.
I hope to finish sighting in bow when it returns from limbs being replaced.
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  #4  
Old 10-02-2011, 01:21 AM
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Join Date: Dec 2010
Posts: 391
Re: hha vertical asjustment

Hi Luv2turn,
We have heard and seen this problem on more TAC15's lately than you would believe.
The advice that came from WildWillie is the correct solution. Super 91 did 3 crossbows in the past two weeks that all had this same problem. He uses thin walled PVC as his shims and he's stated that it works very well.

I think it was WildWillie that found out that Burris makes a set of rings and a shim set that is made to take care of this problem. There are different sizes available for different scopes. It allows both vertical and horizontal adjustment, so it's perfect for solving this problem.

Russ can you give them the specifics on the rings and shims that you told me about in your lat e-mail?

Jon
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  #5  
Old 10-02-2011, 12:20 PM
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Join Date: Jun 2011
Posts: 6
Re: hha vertical asjustment

i had to re-machine my scope rings on an angle. Mine was shooting about 10 inches high. I machined them .060" lower at the back, with the rings spaced 4.25 inches apart. lowering the wisker biscuit only made it shoot inconsistent.
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  #6  
Old 10-02-2011, 12:42 PM
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Join Date: Sep 2011
Posts: 24
Re: hha vertical asjustment

Quote:
Originally Posted by WildWillie View Post
I put shims under the scope on the front mount. I was almost 5" high at 20yds

WildWillie

What did you use for shims?
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  #7  
Old 10-02-2011, 02:19 PM
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Join Date: Jan 2011
Posts: 54
Re: hha vertical asjustment

I used a thin piece of aluminum that I cut about 3/8" x 3/4" sandwiched between two pieces of Mole Skin cut to fit as well. I pre-molded the aluminum a bit so it was curved, but when you tighten the scope down it conforms pretty good.

WildWillie
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