When it comes to ballistics I'm pretty much an expert, So I'm gonna ask what grain weight of bullet is that , that shoots "dang near flat out to 300 yards"?

If you can ask alot of people on this forum, they will say not to get me started on ballistics because I will go on and on about ballistics. I am a walking ballistics encyclopedia. Just wanted to warn you OK.

One thing I will give you is that the 300 RUM does have considerably more energy then a .308
BUt......
This is where I will begin giving you a hard time.

I will assume since you say you shot for the navy, You already understand that givin under pefect shooting conditions and adverse conditions humidity level , altitude blah blah and blah you already know all that . Basically your charge doesn't detonate the same in cold weather or high altitude the same as it does at sea level under perfect conditions. But you already know that I'm sure.

Here begins my example, note that this data is data given to me by a friend in missouri who runs a private gun club. A really neat facility I might add, it is a 1,000 meter range built
underground in a cave with climate control of 65 degrees %30 humidity, 803 feet above sea level no cross wind all year long pretty much as perfect as it gets asfar as shooting conditions.

Heres two loads to compare:

.308 winchester Case: Remington Primer: fed 210 Powder: 45 grains varget bullet: 180 grain nosler partition seated at 2.790 COL, ballistic coeffient: 0.474 velocity: 2,643 fps @ 3 feet from muzzle.

Ballistics 100 200 300
_________2" -O- -9.06


.300 RUM Case: Remington Primer: fed 215m Powder: 104 grains of H870 Bullet: 200 grain Nosler partiton seated at 3.530 COL , Ballistic coeffient: 0.481 velocity: 3,018 fps @ 5 feet from muzzle, Note: @ 3 feet muzzle blast nocked over chronograph.

Ballistics 100 200 300
________1.5" -0- -7.2

Well both zeroed at 200 meters. At 100 meters theres only a .5" difference and at 300 meters only a 1.86" difference.

So if your 300 RUM shoots "dang near flat" My .308 shoots just about dang near flat
not enough difference for you to take such a leap to make the statement you did.

Something tells me asfar as your knowledge is about ballistics, It goes no further then what the salesman at walmart told you when you bought your rifle.

I'm begining to doubt that you shot for the US Navy, Otherwise you would be better versed in ballistics, I am begining to think you are some 19 year old kid that is still wet behind the ears, who is loaded with BS.