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hha vertical asjustment

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  #8  
Unread 10-02-2011, 07:31 PM
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Join Date: Dec 2010
Posts: 391
Re: hha vertical asjustment

Thanks for the shimming tips WildWillie.

I also copied a response from Super 91 on this question and here's the methodology he recommends and uses:

Russ, I have set up three TAC-15's over the past two days, two with the HHA and one without. All three ran out of scope adjustment like you and ended up shooting high. We ended up shimming the scope with thin-wall pvc pipe pieces which are dense and conformed to the inside of the rings perfectly. If you shim the front ring, this will bring you down for your scope adjustment and you can shift it left or right just a little to compensate for the windage.

The main point I wanted to bring out is that PSE has no right providing bad information to their customers. Two wrongs don't make a right and by moving the rest down you are only taking your crossbow further out of alignment. The problem is not in the crossbow or its rest, it's in the Weaver Rail and its ability to align properly with where the scope is pointing.

To simplify the problem I'll explain it like this: When your crossbow is leveled and shooting a perfect center at 20 yards, your scope is aiming some place else (to high and left). The solution is to get your scope pointed at the exact spot where your crossbow is hitting. This is the only way that your crossbow will remain very accurate as you begin to move back and increase your distances. If you do not fix it the correct way, by zeroing the scope to it's center line at 20 yards the problem will continue to worsen as you move further away from the target. Windage is always set at your longest distances because once you have it tuned at 20 yards and deviation will show at the longest yardages. By correcting it at these distances it will be unnoticeable at your short distances.

Hope this helps explain what your trying to achieve.

Jon
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  •   #9  
    Unread 10-02-2011, 09:15 PM
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    Join Date: Jul 2010
    Location: Alabama
    Posts: 53
    Re: hha vertical asjustment

    Hi jon.henry755,

    The rings you referenced are Burris Signature Zee Rings, 1" or 30mm (Weaver Style or Dovetail). There is also a kit available with inserts of .005" thickness, .010" thickness and .020" thickness for these rings.

    There is a review here on LHR in the June articles by M.L. McPherson on these rings. Great explanation of how they work and what they will do!

    I have some on order and should get them Tuesday. I'll post my results because I'm trying to solve the same sighting problem as you and Super 91 know.
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      #10  
    Unread 10-02-2011, 09:20 PM
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    Join Date: Dec 2010
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    Re: hha vertical asjustment

    rmbeach,

    Perfect answer rm.

    Thank you for the input since many of the members can benefit from this advice. Please keep us informed on how this solution works. In my opinion, this is the best solution to the problem and it would be the easiest for most people.

    Regards,

    Jon
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      #11  
    Unread 10-02-2011, 11:00 PM
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    Join Date: Dec 2010
    Posts: 391
    Re: hha vertical asjustment

    Hi All,
    I just received the information I've been searching for from one of our members known as rmbeach. We've been working for the last few days on the same set of problems that you guys and many others are experiencing, so rather than elaborate on it, I'm going to post his reply back to me, since I believe it's the best possible solution for all of you.

    This is what I would be doing if I had the same problem happening on my crossbow.

    Super 91 is great at improvising or creating a custom solution when needed, but sometimes that needs to be reserved for when there isn't already a good off-the- shelf solution readily available. See what you think?

    Hi Jon,

    The rings you referenced are the Burris Signature Zee Rings, 1" or 30mm (Weaver Style or Dovetail). There is also a kit available with inserts of .005" thickness, .010" thickness and .020" thickness for these rings.

    There is a review here on LRH in the June articles by M.L. McPherson on these rings. Great explanation of how they work and what they will do!

    I have some on order and should get them Tuesday. I'll post my results because I'm trying to solve the same sighting problem as you and Super 91 know.


    Regards,

    rmbeach
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      #12  
    Unread 10-03-2011, 01:10 PM
    Junior Member
     
    Join Date: Sep 2011
    Posts: 24
    Re: hha vertical asjustment

    Quote:
    Originally Posted by rmbeach View Post
    Hi jon.henry755,

    The rings you referenced are Burris Signature Zee Rings, 1" or 30mm (Weaver Style or Dovetail). There is also a kit available with inserts of .005" thickness, .010" thickness and .020" thickness for these rings.

    There is a review here on LHR in the June articles by M.L. McPherson on these rings. Great explanation of how they work and what they will do!

    I have some on order and should get them Tuesday. I'll post my results because I'm trying to solve the same sighting problem as you and Super 91 know.
    Where did you order from? I did not think the .020 were avilable for the 30mm ring.
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      #13  
    Unread 10-03-2011, 09:09 PM
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    Join Date: Jul 2010
    Location: Alabama
    Posts: 53
    Re: hha vertical asjustment

    Luv2Turn, you are correct; the Burris Signature Zee 30mm Rings comes with Burris Concentric inserts and +/- .010" inserts.

    I'll send order info in a PM if I can figure out how to send it.
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      #14  
    Unread 10-04-2011, 12:28 AM
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    Join Date: Dec 2010
    Posts: 391
    Re: hha vertical asjustment

    Thanks Russ!

    I'm sure many of the readers on this forum as well as Crossbow Nation are having this same problem,but don't have the correct solution.

    My bet is most have lowered their arrow rests and are living with the results. This is also probably why they've never achieved the type of accuracy that some of us have written about in our articles.

    This is just another good example of how problems affecting numerous people can be solved when we work together as a team. Nice job!!!

    Regards,


    Jon
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