Ray-

That's why I chose as close to a straight across comparison as I could. If Remington inflates one, they're gonna inflate the other. Pretty fair comparison that way, rather than picking and choosing handloads or different company's ammo.

Regardless, if you want to compare handloads, fill up a case of each (in your original post, you compare a 308 to a 30 caliber magnum, bigger case, more powder; in the this scenario, same parent case, same basic capacity), load a bullet, go chronograph it, and run the ballistics. And remember, you don't kill stuff at the muzzle (your Africa charges not withstanding). Look at the remaining velocity and energy downrange, where a deer is going to be standing, and tell me that the bullet with better ballistic coefficient (in this case the 7mm-8) isn't going to start outrunning the other one before it gets to the deer.