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specs for 90t hpar rib adj and factory bbl bore si

Discussion in 'Shooting Related Threads' started by jbouvrette, Sep 22, 2011.

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  1. jbouvrette

    jbouvrette TS Member

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    what are the adjustments for poi on a 90t hpar starting from rear adj hole foreward//also what are the factory bore size of the bbl/thanks
     
  2. GunDr

    GunDr Well-Known Member

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    Rib down...6" high at 40yds

    Rib up...50/50...dead on aiming point at 40yds

    Bore.... .737"

    Choke... .040"


    Doug
     
  3. BROWNST100

    BROWNST100 Member

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    Doug...What were the specs. on the factory choke tubes?

    Vern
     
  4. kene

    kene TS Member

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    if available what is POI spec for non-adjustable low rib version of 90-T. am considering getting one of those.

    is the bore of that one also .737"? and are the forcing cones lengthened?

    appreciate the info.

    thanks

    kene
     
  5. short shucker

    short shucker TS Member

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    BROWNST100,

    They were never done as "factory" tube guns. Kolar did tube a few at customer request in increments desired by the customer.

    Kene,

    The POI is a tuffy as everyone mounts one differently. General rule of thumb is between 60/40-70/30 with the stock comb height.

    The bore diameters on the low rib can vary greatly. Most are between .740 and .745, but I've seen them as big as .754 on factory barrels.

    I'm sure if I missed something or have it wrong, Doug will correct me. I'm good with that.

    ss
     
  6. BROWNST100

    BROWNST100 Member

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    Short shucker...you don't by any chance have a picture of what the looked like, do you? Or a good description.

    Vern
     
  7. short shucker

    short shucker TS Member

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    BROWNST100,


    A lot like the S-2 choke tubes that Briley has. They were a long flush fit tube. Sorry I don't have any pic's though.

    ss
     
  8. BROWNST100

    BROWNST100 Member

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    short shucker....Thank You, Sir

    Vern
     
  9. dale58

    dale58 Well-Known Member

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    I think the 90-T was the best trap gun ever built, for the price they sell for. Dale
     
  10. GunDr

    GunDr Well-Known Member

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    During the production of the 90-T, I did the majority of patterning before the guns got shipped.

    The shooting was done indoors, off a rest. I would shoot at 40yds with the beads aligned as a figure 8. POI was generally 3-4" high. Pattern density was in the mid to upper 80%.

    Short-shucker is correct, no 90-Ts came with factory chokes, Kolar did do many as an aftermarket "option".
     
  11. dale58

    dale58 Well-Known Member

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    Hey GunDr, did the bores come as big as .754 as short-shucker says? and if so what would the choke have measured? thanks Dale
     
  12. GunDr

    GunDr Well-Known Member

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    The ealier guns did have larger bores. remington supplied the hammer forged blanks and because we were aiming to have bores of around .742", Remington's mandrel was at .742". By the time the rib was installed, the barrel straighten, we had to bore the barels to a larger ID to get things to clean up.

    When we ordered more barrels, we would request Remington to forge on a smaller mandrel. Each time it was only about .005" smaller. Eventually, by the time we got to around serial number 1500 or so, they finally had the madrel down to about .730". This allowed us to get the std 90-T to about .742" and the hi-rib 90-T to .737"

    It was Remington's request that the hi-rib 90-T have a bore of .737". Apparently there were some squeaky wheels on the ranges that said that .742 was too open for a trap gun. Remington also said to leave more choke (.040")in the hi-rib guns for the same reason.

    Doug
     
  13. dale58

    dale58 Well-Known Member

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    Thanks Doug , great info. as always. Dale
     
  14. Beretta687EELL

    Beretta687EELL Well-Known Member

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    I have a HPAR with a .745 bore and Briley choke tubes installed by Kerry Allor. It shoots almost as well as my Kolar T/A Max. Bill Malcolm
     
  15. dale58

    dale58 Well-Known Member

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    I have a HPAR with a .749 bore and a .711 fixed full choke ( done by Wilkinson stamped on mono block) and i love it. very soft shooting. Dale
     
  16. bjk1972

    bjk1972 Member

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    My 90T low rib has a bore of.754 and choked at.034, its a low 500 serial number. Soft shooter!
     
  17. short shucker

    short shucker TS Member

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    Any and all of my info on 90T's come from two places, personal observations and Doug Braker. Doug is the goto guy on 90T's!

    ss
     
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