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Thread: Failed attempt at precision shooting with red-dot

  1. #11
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    Okay, thanks for the input, all. I'm definitely going to try some different targets next time out - both the B2, and an 8" dot and see what happens. Due to cost, and apparent acceptable accuracy, I'll most likely be using the AE blackbox 50gr varmint.

    I think the breathing may have been an issue, and maybe inconsistent cheek-weld. I noticed there may be minor parallax issues with the PA micro.

    As for POI/POA, I have it set up to hit the top of the dot at 100yds. I graphed theoretical 60gr TAP ballistics below, the red line is the bottom of the red dot, and the top is the x-axis. I do see some theoretical benefit as you can use the dot as a hold-over. For example, at about 275-300yds the bullet will impact within an inch of the bottom of the dot. That said, you could do the same with a 2moa dot as well.

    Last edited by MegademiC; 07-07-14 at 06:28.

  2. #12
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    That is not a "Fail"! What your seeing (Assuming center hold) is the difference of the loads used (Lot#, bullet wts) and the effect of barrel harmonics! If your saying the the fail is the group size then stop using a dot, use a scope instead ! A dot is not made to shoot bug holes.

  3. #13
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    Quote Originally Posted by MegademiC View Post
    I graphed theoretical 60gr TAP ballistics below, the red line is the bottom of the red dot, and the top is the x-axis. I do see some theoretical benefit as you can use the dot as a hold-over. For example, at about 275-300yds the bullet will impact within an inch of the bottom of the dot. That said, you could do the same with a 2moa dot as well.
    That chart is a fantastic visual aide. That really sheds some light on the dramatic change of bullet position within the dot relative to trajectory. Thanks for posting it. I recently shot mostly irons at a 12" x 20" steel silhouette at 300 meters, but briefly tried the dot with little success. Considering the dot is also 12" wide at that distance it is no wonder. I like your thinking here, and I'm going to give this a try.

  4. #14
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    Quote Originally Posted by GunnutAF View Post
    That is not a "Fail"! What your seeing (Assuming center hold) is the difference of the loads used (Lot#, bullet wts) and the effect of barrel harmonics! If your saying the the fail is the group size then stop using a dot, use a scope instead ! A dot is not made to shoot bug holes.
    People do it with irons, I should be able to do it with a dot... Figuring out "how" is a little different though. I remember seeing molon posting a very impressive group with an rds... 3 shot composite int the 1.2" range. I don't have a scope yet, but want to find out what shoots well out of my gun... hence the range trip that led to this thread.

  5. #15
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  6. #16
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    Seems about right to me. I've found it hard to make tight groups with a 4moa T1 at 100 yards. But that's not my goal anyway. When I'm shooting with an RDS I just have a goal of shooting certain sized groups at different distances. Bench and free hand.

    If I want to get more precision then I use a rifle with a magnified optic. That's when I can really tell more about the rifle's accuracy with different types of ammo. I guess you need to use a different optic tool to find out what the maximum accuracy is for that rifle.

    I think your shooting is pretty good.

  7. #17
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    The chart fits what I have observed with my own setup. I have to hold the bottom of the 4 moa red dot on the top of the head of a B-27 silhouette at 400 yards to get center mass hits with 62g ammunition.
    Train 2 Win

  8. #18
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    Quote Originally Posted by T2C View Post
    The chart fits what I have observed with my own setup. I have to hold the bottom of the 4 moa red dot on the top of the head of a B-27 silhouette at 400 yards to get center mass hits with 62g ammunition.
    Thanks for the feedback. I'm looking forward to trying it out, hopefully this weekend.

  9. #19
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    Kinda related to precision red dot work, but vickers tactical just posted this.

    I say impressive, but my old lady says I'm easily amused...

    Aimpoint Distance Challenge: http://youtu.be/c_Q3_vwJlNA

    LAV, mighty fine shooting sir.
    Last edited by cbx; 07-09-14 at 01:06.

  10. #20
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    Wow, with my 42yr old eyes, I'm not sure I could even SEE that target at 600Y (though if it was going to be filmed, I'd have my optometrist hook me up with some binocular-like Rx glasses).

    I do wish I had a place to try it--local range only goes to 200Y, and I've never tried it without a 3X behind the 2MOA T1.

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