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

[Snowy Owl]

Question for the 303 British cartridge experts :

What is the ballistic coefficient of the 174 gr. flat-base pointed (Spitzer) bullet used in the 303 British Mk VII ammo ? I can read on Wikipedia that the ballistic coefficient is supposed to be .467 but I can't find any corroboration anywhere else. Wikipedia might be right and it might also be wrong.

I have tried to get a definite answer to my question on Military Surplus Collectors Forums but to no avail, up to now : 191 views, 6 replies, no clear answer as I am typing this post - and there are some very knowledgeable people there.

Somebody, somewhere, must have the answer - well, I hope !

 

[Ganderite]

I would just use the BC of the Sierra 180 Spitzer. It would eb close.

 

[teenahlake]

311 dia. 174 gr. HPBT MatchKing
.311 174 .257SD
.499 @ 2200 fps and above
.493 between 2200 and 1800 fps
.480 @ 1800 fps and below

.470 sounds pretty close

 

[cigar_man]

Ganderite wrote;

I would just use the BC of the Sierra 180 Spitzer. It would eb close.

If anyone would know, Ganderite is your man.