Holds for 25 Yard Zero?

[IdahoMike]

I am sorry guys but my google-fu is weak tonight.

I am trying to figure out holds for a 25 yard zero with my 16" in 5.56, 55 grain FMJBT. I could figure it out by burning up ammo like it's free, but I don't want to to that. I just need somewhere to start so I can figure out my actual holds (50, 100, 200, 300...). Any info would be tits.

Thanks,

Mike

 

[Rando]

Re: Holds for 25 Yard Zero?

hand loads, velocity, out to what range, etc....????

 

[IdahoMike]

Re: Holds for 25 Yard Zero?

yes the specifics der... velocity is 3090, not hand loads, just looking for approximate holds out to 400

 

[Rando]

Re: Holds for 25 Yard Zero?

ok. zero'd atmosphere, 25 yd zero, 55gr @ 3090.

100= +2.99
150= +3.55
200= +2.75
250= +0.39
300= -3.81
350= -10.17
400= -19.07
450= -31.00
500= -46.53

just a quick JBM off my iphone. not gospel. hope this gets you started.

 

[IdahoMike]

Re: Holds for 25 Yard Zero?

Thanks a bunch Shooter.

 

[Trigger Monkey]

Re: Holds for 25 Yard Zero?

Here is some dope and associated data that I have for XM193, this is part of a hand out that I made up for a carbine class that I helped out with:

55 gr FMJ with a BC of .233 and a MV of 3075 fps.
DA of 2,000' and a height over bore of 2.5"

 

[jakerz3]

Re: Holds for 25 Yard Zero?

^^What program did you use to make the figures at the bottom? The ones using the eotech reticle.

 

[BBJones13]

Re: Holds for 25 Yard Zero?

Not a fan of 25 yard 0. 50 yard or 100 yard offer many advantages IMO.

50 yard your hold overs and unders are not nearly as large especially 150 and in (the distance that most shots are taken and if for defensive/military/LE purpose will need to be done the fastest).
100 yard zero really doesn't force any hold under except at extremely close range. Basically you just have to learn your hold overs which in my mind are easier than worrying about over @ x distance and under @ y distance. At longer ranges you will have a slot more hold over but you should also have time to figure that out.

ETA - OP you should verify by shooting if at all possible whatever 0 you choose. It is far from wasting ammunition.

 

[IdahoMike]

Re: Holds for 25 Yard Zero?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BBJones</div><div class="ubbcode-body">Not a fan of 25 yard 0. 50 yard or 100 yard offer many advantages IMO.

50 yard your hold overs and unders are not nearly as large especially 150 and in (the distance that most shots are taken and if for defensive/military/LE purpose will need to be done the fastest).
100 yard zero really doesn't force any hold under except at extremely close range. Basically you just have to learn your hold overs which in my mind are easier than worrying about over @ x distance and under @ y distance. At longer ranges you will have a slot more hold over but you should also have time to figure that out.

ETA - OP you should verify by shooting if at all possible whatever 0 you choose. It is far from wasting ammunition.</div></div>

I plan on shooting and learning my holds. I just wanted a base to start from rather than throwing rounds downrange after a guess.

 

[HPLLC]

Re: Holds for 25 Yard Zero?

That's a pretty cool chart.

 

[Trigger Monkey]

Re: Holds for 25 Yard Zero?

Proud Noob,

I made that chart using Microsoft Word. I imported the pictures from ones I had saved on my desktop and played around with it to make it look good.

 

[IdahoMike]

Re: Holds for 25 Yard Zero?

TM,

Thanks, for the info. Last night I was a wreck from some post exam Nyquil.

 

[Trigger Monkey]

Re: Holds for 25 Yard Zero?

Mike,

It's no problem, I completely understand because I've been there myself. I hope you find the info useful and have a great time at the range.

 

[Chris K]

Re: Holds for 25 Yard Zero?

Coming in a little late, but at a school I was at a few years back this is what some of the AMU guys had for green tip from a M4 with a 25m Z.

[img:center]

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[DerMeister]

Re: Holds for 25 Yard Zero?

Really nice, I can use this information for my SLR-106fr with a 16.25" barrel.

 

[Captain Moroni]

Re: Holds for 25 Yard Zero?

Mike, I thought you were an accuracy by volume guy???

 

[CageFighter]

Re: Holds for 25 Yard Zero?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Trigger Monkey</div><div class="ubbcode-body">Here is some dope and associated data that I have for XM193, this is part of a hand out that I made up for a carbine class that I helped out with:

55 gr FMJ with a BC of .233 and a MV of 3075 fps.
DA of 2,000' and a height over bore of 2.5"

</div></div>


do you have one of these for a 308Win<span style="font-weight: bold">/</span>7.62x51?

 

[onyx1357]

Re: Holds for 25 Yard Zero?

I use the jbm ballistics calculator online it's free and pretty easy just chrono your gun and know what your shooting

 

[IdahoMike]

Re: Holds for 25 Yard Zero?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Captain Moroni</div><div class="ubbcode-body">Mike, I thought you were an accuracy by volume guy???</div></div>

Haha, well that was supposed to be a secret but now everyone knows.

 

[BOL556]

Re: Holds for 25 Yard Zero?

I have found that if you do zero at 25 yards your shots at 200 are way off. I started zeroing at 25 yards but 2 inches low. Problem solved all the way out to 400.