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Thread: Interesting Zero testing session

  1. #1
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    Interesting Zero testing session

    Well I've just had a very interesting zero/testing afternoon which has the potential to be quite informative once I digest everything.
    Shot 25yds seated with the Scorpion se sub 12 .25cal, for now I'll just put up the target sheet, with basic info for comment, with more interesting detail to follow.
    sorry the edges are a bit rough the back board got shot to bits so the target was ballooning a bit more than it should have.
    Each aim point had 2x 8 shot mags at my usual speed 10-15 seconds between shots.

  2. #2
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    POI progressively rising, so perhaps too high a fill pressure ?
    Second group is interesting.. why off to the right ?
    I'm currently looking for: pair of scope mounts to suit a 13mm BSA rail, a tx200 cd trigger unit top sear, and any cheap, interesting, knackered project guns. Thanks, JB.

  3. #3
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    If thatís 25yds then something is very wrong, let alone the trend in POI shift.

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    Interesting Zero testing session

    Were you testing a new pellet ?

  5. #5
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    Quote Originally Posted by RobF View Post
    If that’s 25yds then something is very wrong, let alone the trend in POI shift.
    Why do you say that ?

    Sorry it should read 10-15 seconds for each shot not between
    'cock, aim, shoot, check chrono' for each shot, about 2 mins from loading the full mag to removing it empty.
    Last edited by angrybear; 05-07-2020 at 12:37 AM.

  6. #6
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    Quote Originally Posted by junglie View Post
    Were you testing a new pellet ?
    No, resetting the power as it was only doing 7.7ftlb the other day.

  7. #7
    Jesim1's Avatar
    Jesim1 is offline Can juggle 3 pineapples but not 4!!!!
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    Quote Originally Posted by angrybear View Post
    Why do you say that ?
    TBF it's not the tightest groups I've seen, given it's a .25 I'd still be looking for a 1p cloverleaf even if an odd sideways drift with conditions
    I'll be an Air-Gun God when I master the 4th Pineapple!

  8. #8
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    Quote Originally Posted by Jesim1 View Post
    TBF it's not the tightest groups I've seen, given it's a .25 I'd still be looking for a 1p cloverleaf even if an odd sideways drift with conditions
    True enough, but I was trying more to replicate a fairly rapid fire ratting situation than trying to put them through the same hole.

  9. #9
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    Rumbled

    OK, Well having been rumbled straight off that all is not well , across the chrono the average by magazine.

    1 = 9.22 ftlb, 2 = 9.70 ftlb, 3 = 10.05 ftlb, 4 = 10.39 ftlb, 5 = 10.69 ftlb, 6 = 10.91 ftlb, 7 = 11.30 ftlb, 8 = 11.35 ftlb, 9 = 11.50 ftlb, 10 = 11.57 ftlb

    outright minimum 8.90 ftlb, outright maximum 11.79ftlb (2.89ftlb spread)

    each individual magazine was actually pretty consistent, every one the velocity spread was single figure fps, 9fps to 3fps across the 8 shots

    Fill pressure - start 230bar, after mag 5 180bar, end 125bar.

    Oh & just to make it really interesting 7 mags were FTT 20gn, 3 mags at random were JSB 25.4gn

  10. #10
    Jesim1's Avatar
    Jesim1 is offline Can juggle 3 pineapples but not 4!!!!
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    It just didn't fit your style, it was too shabby, something was up, and now you can "zero" in on it and get it sorted as I'm sure you will end up with one hole groups once the issues are identified. It could be a combo of poor pellets or a fault with the gun somewhere - a probe seal would be the grail fault
    I'll be an Air-Gun God when I master the 4th Pineapple!

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