Ballistic coefficient of the bullet used in the 303 British Mk VII ammunition ?

[jmoore]

I'd guess that the .468 number is close enough for most purposes. The 180gr Sierra hunting bullet is rather shorter as it doesn't have the plug in the front of the bullet found in the Mk.VII. The SP bullet's ogive and nose are blunter. But the 180gr Sierra still matches the military ball's flight characteristics with in a minute or two out to 700 yards, based on shooting them through No.4 Mk.I (T) rifles.

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[Patrick Chadwick]

I'd guess that the .468 number is close enough for most purposes.

Agreed. The Sierra ballistic tables show the difference in drop at 300 yards (for the two types I quoted, at 2600 fps) as being about 1". If you can tell that differenced shooting a milsurp, you shouldn't be wasting your time reading our ruminations, but out there collecting your international medals, as that difference amounts to about 0.3 MOA.

So unless you are intending to shoot at 1000 yards by dead reckoning, with a benchrest rifle, I really doubt that knowing the value to 3 figures matters at all.