curious sam wrote:
Sure. Apples to apples is what you are missing.
Real world -
USA Brand ammunition is the ideal choice for training-or extended sessions at the range or in the field. As you'd expect, USA Brand Centerfire Rifle Ammunition features high quality and reliability at an economical price. Symbol: Q3174 Caliber: 7.62x39mm Bullet Weight: 123 Grains Bullet Type: Full Metal Jacket Test Barrel Length: 20" Velocity in Feet Per Second: - Muzzle: 2355
^^ That is Winchester ammo, measuring the velocity from a 20" bbl.
300 BLK, 125 gr OTM 2230 ft/s, 1380 ft-lb
Remington ammo. I think it is important to remember you have to compare one major manufacturer to another. If we compare Double Tap to Winchester, Double Tap will win every time - on paper.
From AAC's .pdf, that is 300 out of a 16" bbl
If you measured the 300 out of a 20" bbl, I'd imagine you will get the same or slightly higher velocity.
The 7.62x35 projectiles tend to have a superior BC and fly with less velocity loss as compared to range.
That is true, Robert specifically set the SAMMI test barrel length for 300 BLK to 16". much shorter than typical