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LD is right on the money (as usual 
).
Those bullets are just built with a lighter jacket and primarily designed to function as designed at .223 velocities out of faster twist barrels. If you exceed that, there is a very good possibility that they will do as LD said...start to disintegrate as soon as they leave the barrel.
They're kind of a middle ground between the "standard" bullet jacket and the thin-jacketed varmint (Blitz, SX, TNT, etc) bullet styles.
). Those bullets are just built with a lighter jacket and primarily designed to function as designed at .223 velocities out of faster twist barrels. If you exceed that, there is a very good possibility that they will do as LD said...start to disintegrate as soon as they leave the barrel.
They're kind of a middle ground between the "standard" bullet jacket and the thin-jacketed varmint (Blitz, SX, TNT, etc) bullet styles.
