The 280 is outpaced,no matter the projectile. That of course being said,both are ONLY at their best,with the best bullets. Pass the 180 Hornie,in both. Hint.
Every Big Green 7mm RemMag ever built,will stabilize said .796 BC 180. The Masburn and the ilk,simply steal COAL latitude,which are multiple steps backwards. Hint.
What bullets,are you shooting in your 300 Winny? Hint.............