[quote=4100fps
Another point of clarification, the .280 was originally chambered in Remington, pump actions, and semi auto. They had to keep the CUP low, for those actions to safely function. Later manufacturing of the round in bolt actions showed they could handle pressures relative of those used in the 7mm. They called it the 7mm express Remington. So people wouldn't use it in the older guns. This caused a mess with the two chamberings being the same. So they went back to calling all the rifles and ammo .280 Remington. Only factory ammo was loaded soft in case the older guns were used. That's why factory ammo ballistics for the .280 arent that of the 7mm. Although hand loaders know the benefits. [/quote]
Forget factory ammo, compare handload data with similar pressure data and powders, both with 24� barrels:
2644fps = .280 Rem, 162g Hornady A-AMAX, 54.5g H4831, 49,300 CUP
2871fps = 7mm RM, 162g Hornady SPBT, 64.0g H4831, 49,800 CUP
2614fps = 280 Rem, 162g Hornady A-MAX, 49.5g H4350, 49,900 CUP
2799fps = 7mm RM, 162g Hornady SPBT, 58.0g H4350, 49,400 CUP
Greater case capacity wins every time it is tried. That�s why the .280 Rem cannot keep up with the 7mm RM.
