WB
Someone has taken to experimenting with
Thursday, August 29, 2024, 14:38

unusual fast rifling twists for primarily subsonic applications. Your old bud JD did so much work for low volume sub-gun calibers and collaborated some trying to fabricate a sub projectile that would do some damage. Some success has been made with expanding solid metal bullets with pre-fragmented sections.

But just lately someone figured that spinning the bullet crazy fast would make it not only penetrate like a drill bit, but create a heck of a wound too. All this with low forward velocity, but spinning at a crazy rpm. The new .338 cal on the shortened .308 size case (6.5 CM actually) has a rate of twist of one turn in three inches. That's CRAZY! But there is something valid with the physics. Compare a relatively heavy and long 300 gr. bullet at 1050 fps, spinning literally 500,000 rpm, to a .308 Win. at 2600 turning only 156,000 rpm (1:12" twist).

Some strange stuff being toyed with...