[Mariner]

Silly boy, it's a proven concept and application.

Most sniper rifles overcome it with 1 inch dia barrels...but in lightweight barrels is a KNOWN and MEASURED phenom.

You only display abject ignorance by suggesting otherwise.

A lightweight barrel will vibrate...and will vibrate at different frequencies depending upon bullet weight.

The key to accuracy in a lightweight barrel is to find which bullet weight for the chosen caliber, will exit the barrel at the apex of the vibration's cycle.

That's why they free-float lightweight barrels and that's why the Browning A-Bolt with BOSS is the most accurate lightweight rifle in the world.

[6ppc]

The key to accuracy in a lightweight barrel is to find which bullet weight for the chosen caliber, will exit the barrel at the apex of the vibration's cycle.

Correct, but also depends on powder charge and primer. Some primers explode with more energy than others.

Also applies to all barrels, it's just more obvious with lightweight barrels.

[going hot]

The resonance can be mitigated by keeping other parameters exactly constant.

cartridge length, bullet seating, exact powder measure, exact weight of the case prior to loading (same batch) will cause the vibration propagation to be the same each time, and the bullet will leave the barral at same point in the wave.