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Thread: Sionics Extreme Reduced Gas Port Barrel, Range Report

  1. #21
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    Quote Originally Posted by Pappabear View Post
    Yea I think so few people have appropriate optics for distance, no for shooting tight groups on 11.5 and below. That's red dot land. But have done it before and will pop something on it Sunday just for the record.

    Shorter barrels are not inherently inaccurate.

    PB
    I understand that. I need at least 3x to shoot moa at 100+ yards. I'm an LPVO convert though after a few carbine courses. Debating which one to out on the 12.5 I'm getting. NX8, Atacr, etc.

  2. #22
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    Quote Originally Posted by WS6 View Post
    I understand that. I need at least 3x to shoot moa at 100+ yards. I'm an LPVO convert though after a few carbine courses. Debating which one to out on the 12.5 I'm getting. NX8, Atacr, etc.
    Those are some good options, id love 1-8 NF scope , one day ...

    PB
    "Air Force / Policeman / Fireman / Man of God / Friend of mine / R.I.P. Steve Lamy"

  3. #23
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    As I recall the FBI barrel was around .070/.071 ish range. I think someone posted it elsewhere here.



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  4. #24
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    Quote Originally Posted by Iraqgunz View Post
    As I recall the FBI barrel was around .070/.071 ish range. I think someone posted it elsewhere here.
    That's the same as CRANE's 10.3". How much difference in "function" does another 1" or so of barrel make? I mean, if you had to equate a 0.065" ported 11.5 to a 10.3", what is that equivalent to?

    For example "0.065" in an 11.5" is like 0.070 in a 10.3" due to less dwell." or something

  5. #25
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    Quote Originally Posted by WS6 View Post
    I mean, if you had to equate a 0.065" ported 11.5 to a 10.3", what is that equivalent to?

    For example "0.065" in an 11.5" is like 0.070 in a 10.3" due to less dwell." or something
    In my experience, .065 in 11.5 would be like .067-.068 in a 10.3". Both gassed on the lean side of unsuppressed functionality.
    "You people have too much time on your hands." - scottryan

  6. #26
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    Quote Originally Posted by markm View Post
    In my experience, .065 in 11.5 would be like .067-.068 in a 10.3". Both gassed on the lean side of unsuppressed functionality.
    So on a 12.5, it would be like a 0.062-0.063?

  7. #27
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    Quote Originally Posted by WS6 View Post
    So on a 12.5, it would be like a 0.062-0.063?
    I've never messed with a 12.5". But I'd estimate .063-.064" would be close. Between 10.3 and 11.5, I haven't notices a real difference in porting function. (i.e. a .068" runs very similar in both) But stretching that dwell out to a 12.5" might start making more of a difference.
    Last edited by markm; 08-16-18 at 10:53.
    "You people have too much time on your hands." - scottryan

  8. #28
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    Quote Originally Posted by WS6 View Post
    So on a 12.5, it would be like a 0.062-0.063?
    I believe Centurionís 12.5 is 0.0625


    Sent from my iPhone using Tapatalk

  9. #29
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    Grant measured the 11.5" FBI barrel at .069"

    This is equivalent gas drive to the CRANE 10.3" at .071"


    The timing ratios are different, of course.


    Quote Originally Posted by Iraqgunz View Post
    As I recall the FBI barrel was around .070/.071 ish range. I think someone posted it elsewhere here.
    Quote Originally Posted by WS6 View Post
    That's the same as CRANE's 10.3". How much difference in "function" does another 1" or so of barrel make? I mean, if you had to equate a 0.065" ported 11.5 to a 10.3", what is that equivalent to?

    For example "0.065" in an 11.5" is like 0.070 in a 10.3" due to less dwell." or something
    Last edited by Clint; 08-16-18 at 11:38.
    Black River Tactical
    BRT OPTIMUM Barrels - 16" MPR, 14.5" MPC, 11.5" CQB, 9" PDW
    BRT OPTIMUM-S Barrel - 11.5" CQB Suppressor Gas Drive
    BRT OPTIMUM-S Barrel - 11.5" SB Suppressor, 11.5" SBT 25 Deg Tapered Shoulder Suppressor
    BRT Covert Comps 7.62, 5.56, 6X, 9mm
    BRT MarkBlue Gas Tubes - BRT EXT, EXC and PDW Lengths
    BRT EZTUNE Gas Tubes - CAR and MID
    BRT MicroPin Gas Blocks - .750" & .625"
    BRT MicroTUNE Adjustable Gas Blocks
    BRT CustomTUNE Gas Ports

  10. #30
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    Quote Originally Posted by scooter22 View Post
    I believe Centurionís 12.5 is 0.0625


    Sent from my iPhone using Tapatalk
    Yea, so is hodges 12.5 gas port.

    Sent from my SM-G950U using Tapatalk

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