Copper distance myth

[turner.jc1]

I’m not sure there’s argument here. A lead fragmenting bullet will kill faster than a monolithic copper bullet all things being equal and fair. it causes a larger wound and faster bleeding. If we could shoot everything in the exact right place every time then a solid bullet could make the same argument, a deer would probably die in similar manner. But we can’t. Some compromise is required.

The Barnes ttx etc are similar in wounding to a tough bonded lead bullet. That’s the reality. Nothing more nothing less. Absolutely fine for close range. May be not very forgiving if you get your shot wrong though. And bonded bullets have not been hugely popular generally for the consumer for deer shooting ever. They’re expensive, more finicky to load with precision, and unnecessary. We have no option and are forced to accept our fate ultimately, so non lead it is. Convincing our selves that this sub optimal choice, or the acceptance of no choice whatsoever, is some how better is a coping mechanism quite frankly. The freedom to choose horses for courses and personal preference is the best course of action.

Also I will add here that Barnes LRX bullets seem to have very poor QC, all different weights and wonky tips… they shoot ok though

The lathe turned fragmenting copper bullets will be the future I believe. These bullets are interesting and may be best of both worlds.

The other quite big point is rotational force. RPM will make the tougher bullets open up despite speed. So we may see faster twist rates as a result. The 8.6 blackout is a 1 in 3 twist I believe and uses mono bullets at sub sonic speeds happily..

 

[Tralle]

The other quite big point is rotational force. RPM will make the tougher bullets open up despite speed. So we may see faster twist rates as a result. The 8.6 blackout is a 1 in 3 twist I believe and uses mono bullets at sub sonic speeds happily..

Rotational force is a thing missing in Gavins video (just skimmed through, so I might be mistaken)

As the velocity of a bullet decays over distance and the rotational speed decays a lot slower, the bullet will be spinning a lot faster at distance relative to velocity compared to at the muzzle.

So when he tests by down loading rounds the rotational force is a lot slower than it would be in reality.

Assuming his prc is a 1-8 twist
The 150 ttsx fired at 3150 fps would be spinning at ~283 000 rpm at the muzzle

When it is fired at 1842 is is "only" spinning at ~166 000 rpm

At impact at 700 yards the bullet with mv of 3150 will be spinning ALOT faster than 166 000 rpm.

How this affects terminal performance i have no idea, but it is a missing factor in his test