Quoted:
Quoted:
A 1:8 twist with 55 gr. bullets is a very marginal combination. It is a whole lot better than a 1:7 but still, a 1:8 is pretty fast for a 55 gr. bullet. A 55 should stabilize OK in a 1:8 but a 1:9 or 1:12 would be better, and with UMC being reportedly slightly under powered, my money lies with the UMC ammo being the culprit.
Bullshit. I shoot 45's in a 1:7 and can hit targets out to 300 yards with that combo....
SOME bullets will come apart, some won't.
It depends upon bullet construction and not bullet weight
A bullet moving at 3,200 F/S shot from a 1/7 twist barrel will be spinning at ~320,000 RPM. This creates a significant radial force that will tear many bullets apart.
Hornady TnT's will often come apart in flight with a fast twist. They even have a warning on the box not to shoot then in a 1-10 (or faster) twist barrel (reloading component... not sure about loaded ammo).
Nosler Ballistic Tips are
much less prone to this.
The two bullets use a very different jacket. The solid base of the BTs gives these bullets much more strength and can resist the radial forces while still using a very thin jacket suitable for varmint use.
I would be very surprised if military bullets (FMJ's) are prone to in-flight destruction when shot from a 1-7 twist barrel.