Re: .300 Weatherby vs .300 RUM
I see why you're seeing less performance than what you're expecting. The Ultra mags "advantage" of a larger case pushing a bullet faster narrows considerably when shooting lighter bullets. When shooting 180's or larger, Brian B is exactly right with velocities. The Ultra mag has the muscle to push the heavier bullet faster than the 300 Wby. That being said, a 180 grain bullet at 3200 fps versus the same bullet at 3400 gives up roughly 5 inches at 500 yards. That is only 1 minute! 4 clicks! That is it! To get that 5 inches, you burn almost 20 grains more powder. Is it worth it? In all reality, neither the elk nor the gong is going to be able to tell the difference. A well placed shot from a .30-06 might be slightly harder to place because it drops a bit more than a 300 Ultra, but if you've done your homework, it is not a big deal. Just takes 4 to 8 more clicks!
If it's not far, it's boring.