Bullets for the .303?

[muffett.2008]

Thats a great diagram Alan, but the real thing is a bit different.

Attachment 33936

From the left, G1 case, tracer proj., 8z case, 8z proj., Mk7 proj, Highland FMJBT, Sierra FMJBT, Tiapan HPBT, all 174 grain.

Attachment 33938

The difference in the bases varies a bit from the diagram.

Attachment 33937

Note the more defined taper and less bearing surface than the aftermarket projectiles, this increased bearing surface and softer metal are what combats the old throat erosion stories.

Heres a page from Sierra on BTvFB in .30 cal, remember this problem of throat erosion is applicable right across the board, not just confined to cordite, just a tad more noticable because of the rapidity of the onset with old Military ammo.

Attachment 33939

Though this article does not deal with throat erosion as such, it does bring it all back to barrel condition, our problem is that we don't want to despoil our collectables, but still want match grade accuracy, the unachievable without rebarreling......bugger.