quote:

Originally posted by HPMaster:
AFA the big long 338 300 grn tumbling on impact with a human head, nope, not enough media. That said, in enough non-air media and a non-malleable bullet, secant/tangent ogive pointed types, will always reverse ends in non-air media- you just cannot spin a bullet fast enough to remain ballistically stable in other than air ( something like a rotational velocity of a bunch of millions RPM). A modern fast twist bullet will be running at 200-300k rpm to be stabilized- the longer the bullet, the faster the needed rpm.

Expanding or flat nosed bullets can/do remain in nose first orientation in non air media due to the steering effects of the bullet nose shape or changing balance as a bullet expands and slows.

In the 338/human example given- enough energy can be expended in the target (and the human head is quite liquid/plastic, so energy transfer is good with not much elasticity) to "explode", and the projectile still built well enough to penetrate hard materials too.

Anyway,

quote:

Originally posted by HPMaster:
AFA the big long 338 300 grn tumbling on impact with a human head, nope, not enough media. That said, in enough non-air media and a non-malleable bullet, secant/tangent ogive pointed types, will always reverse ends in non-air media- you just cannot spin a bullet fast enough to remain ballistically stable in other than air ( something like a rotational velocity of a bunch of millions RPM). A modern fast twist bullet will be running at 200-300k rpm to be stabilized- the longer the bullet, the faster the needed rpm.

Expanding or flat nosed bullets can/do remain in nose first orientation in non air media due to the steering effects of the bullet nose shape or changing balance as a bullet expands and slows.

In the 338/human example given- enough energy can be expended in the target (and the human head is quite liquid/plastic, so energy transfer is good with not much elasticity) to "explode", and the projectile still built well enough to penetrate hard materials too.

Anyway,

quote:

Lapua offers a wide selection of .338 LM ammunition including Ball, Armour Piercing, Armour Piercing Incendiary, HPBT, Blank and Drill cartridges. The trajectory of most of the bullets is tailored to match, so there is no need to change the sight setup when changing a bullet type.