This is a discussion on Bullet ''spin'' within the General Firearm Discussion forums, part of the Related Topics category; Originally Posted by rocky Thought I read about .223 bullets fragmenting before impact thru some AR's. Apparently, the really light, ultra-high velocity varmint rounds (40 ...
Apparently, the really light, ultra-high velocity varmint rounds (40 and 45 gr) shot out of a 1:7 twist will tear themselves to pieces shortly after leaving the muzzle.Originally Posted by rocky
OTOH, the longer, heavier 77gr ammo won't stay stable beyond 90 or so yards out of the slow 1:12 barrels.
Fascinating stuff.
Matt
Battle Plan (n) - a list of things that aren't going to happen if you are attacked.
Blame it on Sixto - now that is a viable plan.
Thanks Matt, I couldn't remember exactly what I had read on it.
"In matters of style, swim with the current; in matters of principle, stand like a rock." Thomas Jefferson
Nemo Me Impune Lacesset
Array
Even at 1000fps, it only has 2.4 rotations in 12". Not exactly like a table saw ripping a 12" cut.June - SHOOTING TIMES had an article on bullet spin.
Didja know that a 1:14" twist gives a bullet 144,000 rotations per minute & a 1:7" twist more than doubles it to 308,523 RPM
A table saw blade rotates a 3,000 RPM...so them there bullets are really spinning.
Keep the shotgun handy!!
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