Radius of an ogive

[BoydAllen]

Bullets are produced using dies that vary somewhat from their design drawings because of the processes that are used to produce them. This is why, in short range benchrest, bullets produced using certain dies are very much sought after. If the shapes of these bullets could be precisely matched, then, once a bullet had been discovered to have exceptional accuracy, exact copies of the die that produced it could be made. That is why I suggested comparing enlarged bullet profiles to drawings, in much the same way that an optical comparitor is used to verify things like thread forms. Alternately, I believe that with sufficient enlargement if you draw a line that intersects both ends of a single radius ogive, and you measured the greatest distance between the arc of the ogive and that line, at a right angle to it, at its midpoint, and measure its length between the points of intersection. that the radius could be calculated, and then expressed in terms of the diameter of the shank of the bullet. Of course, this assumes a simplicity of shape of the shank that is in many cases not the case. Many that I have measured have been tapered.

 

[wwbrown]

If you really need the dimensions use an optical comparator as Boyd mentioned or a lathe and a dial indicator, ideally the lathe would have a DRO unit but even without that you could get accurate measurements. But if all you need is volume buy a volumetric flask and submerge the bad boys.

 

[Ggmac]

Aren't you the author of " surplus ammo is garbage ( junk ) ? So are you just changing your mind ? In my opinion , SHOOT more , watch , learn ,then ask logical questions that could improve your score . Not counting video game stuff.

 

[Grimstod]

If you really need the dimensions use an optical comparator as Boyd mentioned or a lathe and a dial indicator, ideally the lathe would have a DRO unit but even without that you could get accurate measurements. But if all you need is volume buy a volumetric flask and submerge the bad boys.

I do not have a lathe but a friend of mine does. Will give this a try.

 

[Grimstod]

Aren't you the author of " surplus ammo is garbage ( junk ) ? So are you just changing your mind ? In my opinion , SHOOT more , watch , learn ,then ask logical questions that could improve your score . Not counting video game stuff.

I never play video games.

Yes I authored that and still think that factory 188 silver light ball is junk. I have not changed my mind and anyone that has ever shot it or torn it apart would not either. Have you?

This post is concerning another type of bullet and ammo all together. Not all surplus is created equal and just cause it comes in a spam can does not mean that it is surplus. I actually should not be calling this stuff surplus cause it is not used by the Russian military today and cannot find any evidence that it ever was. (Note the Finnish military uses it) The Russian military uses something close to it but it comes in entirely different packaging and is more corrosive.