1. Attention: We have put together a thread with tips and a tutorial video to help with using the new software. Please take a moment to check out the thread here: Trapshooters.com Tutorial & Help Video.
    Dismiss Notice

question about 90t hpar

Discussion in 'Shooting Related Threads' started by Dr. Dirt, May 25, 2012.

Thread Status:
Not open for further replies.
  1. Dr. Dirt

    Dr. Dirt TS Member

    Joined:
    Apr 4, 2011
    Messages:
    22
    How tall are the ribs on a 90t hpar? Thinking about adding a rib to my low rib model. Thanks for any info.
     
  2. Recoil Sissy

    Recoil Sissy Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    2,645
    Dr. Dirt:

    Because high rib 90-Ts have adjustable ribs, height at the muzzle will depend on how the rib is set. My HPAR 90-T is set in the adjustment hole nearest the muzzle. I don't know if that results in the highest or lowest poi setting.

    The rib is 7/8" tall at the highest point on the receiver end and 9/16" at the muzzle end. Those measurements are from top of the barrel to top of the rib.

    sissy
     
  3. GunDr

    GunDr Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    2,913
    If you set the POI the same for both ribs, the adj rib is 1/2" higher.

    doug
     
  4. Recoil Sissy

    Recoil Sissy Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    2,645
    Doug:

    I was thoroughly confused by your response until I figured out that the ratio of rib heights (receiver end vs muzzle end) is pretty much the same for a low rib AND a high rib 90-T.

    I assume that means the rib and comb on a standard issue HPAR are 1/2" taller than rib and comb heights on an unaltered low rib. Correct?

    If Dr. Dirt installs a 1/2" add-to rib to his low rib gun, wouldn't he need to raise his comb 1/2" to maintain the same poi?

    sissy
     
  5. 221

    221 Banned User Banned TS Supporters

    Joined:
    Jan 29, 1998
    Messages:
    4,736
    Whether he needs to raise the comb, depends on the size of his head, and, how he mounts his gun.
     
Thread Status:
Not open for further replies.