Zeroing Question

[Chubbs]

Hi Guys

I zeroed my no 4 Mk1* with 200 yards set on a singer rear sight at 25 yards and the POI was 1" above the POA. I then moved back to just over 50 yards and the POA had gone up to about 3" above the POI with 200 yards set on the sight. Is this correct or have I gone wrong somewhere.

Regards Lee

Information

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[enfield303t]

I have not sighted in your way but remember your bullet is climbing the moment it leaves the barrel so it sounds right to me.

Here is a link that will show you the path your bullet takes when fired, hope it helps.

303 ballistics chart - Google Search

[browningautorifle]

Sounds right here too.

[Brian Dick]

The Infantry Training Pam says 3/4" above the point of aim with an allowable variation of up to 1/2" so it's right as rain.

[CINDERS]

Sounds about right to me, not that it really matters but the bullets we have today fly allot better than the old MkVII pill and I concur with #3 & 4.

What you have to do is get the settings on the back sight for all the ranges you will shoot with a particular load you finally decide to use which is not a bad thing means plenty of shooting......

[Peter Laidler]

Once again, you have told us everything - except the most important thing. WHAT AMMUNITION ARE YOU USING? The sights are calibrated for .303 Mk7. And if you ain't using that.......... It's like running your car on 1 star petrol when it was made to run on super dooper 5 star.

[Chubbs]

Thank you Enfield303t, Jim, Brian, Cinders.
Glad to know all is ok. Just wasn't expecting that variation at such a small distance. I have a lot to learn, that's what makes theses forum invaluable.
Peter reason I didn't mention ammo was that I didn't think it would make much difference at that range. I was using handloaded 174gr FMJBT with 38.4gr of N140. PPU Case and head CCI Primer. Don't know what fps it is.

Regards Chubbs

P.S Just need to adjust it left now that the front blade height is ok.

[Peter Laidler]

It clearly does make a difference and this very point has been raised several times previously. I'm no handloader but you ought to zero in initially using UK RG Mk7 ball. Then work up a load that suits the components you have access to v costs etc etc. and take it from there Then use the backsight as a clicker mechanism to give you accurate hits. That way, you will know that to hit the bull at, say, 600 yards, you know that it is 5 on the backsight plus 4 clicks. That's what I used to do when I had a .303 rifle with a 7.62 calibrated sight.

As for the foresight deflection, remember this formula. Foresight INTO the error. Your shots are falling right, move the foresight right.

[Brian Dick]

Competition shooters here in the USA just ignore the sight calibrations and count clicks anyhow as explained by Peter.

[CINDERS]

What I did was copy down where the hash mark on the Rt or left side ends up I.E the closest one to a whole number or even halfway between note that number then if it is 2 clicks either way note that as well therefore when I am changing ranges say a 300M to 500M step I look at the book and go from there instead of going now its 5 clicks to 400 then 7 to 500......then someone talks to you whilst you doing it presto lost count lets go back to a 100!
Each 303 I have has its own book they all shoot the same load with the same projectile and that's it as I have seen guys get side tracked counting away and go from the front of the pack to dead last as in a comp you get 2 sighters and at 500M you would battle to see the splash if its over or short that's my practice and it works for me.