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Topic ClosedMk VII ball ballistics.

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Shamu View Drop Down
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Direct Link To This Post Topic: Mk VII ball ballistics.
    Posted: April 13 2011 at 2:56am
I researched this for someone looking for sight offsets & can't find the thread, so as it's kind of a handy thing to know anyway I'm posting this here.
 
The BC & SD numbers for the Mk VII ball bullet are for the type with the nose filler, not the ones with a solid lead core. Unfortunately I don't have a solid lead bullet handy to measure which you have to do to work out the Ballistic Coefficient. I don't see the difference as being huge, so you can probably use the data for either. If you can't find out which type bullet you have measure the length of the bullet itself. The slightly shorter ones are solid, the longer have the tip filler.
 
The 300 & 600 Yd zeroes are for use with the "L" flip sight.
 
.303 British trajectory notes.
(#4 MkII Lee Enfield with factory iron sights at 1.3" Above bore.)
174Gr Mk VII ball. (filler type bullet)
MV 2450 FPS BC = 0.377 (calculated) SD = 0.257 (calculated)
300 yd zero                      
DISTANCE: 0 100 200 300 400 500 600 700 800 900 1000
PATH: -1.25 +6.6 +5.75 0.0 -17.9 -48.7 -95.2 -161.7 -250.6 -369.9 -512.2
600 yd zero                      
DISTANCE: 0 100 200 300 400 500 600 700 800 900 1000
PATH: -1.25 +22.54 +39.34 +47.64 +45.55 +30.7 0.0 -50.1 -123.7 -225.2 -358.6
Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
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