7mm/300 wn mag is named the 7mm practical. If it were me I'd have it built, if you get one of the factory rifles and the best it will do is 1.5" at 100 yards, then your looking at a best case 9" group at 600 yards, If my long range rigs won't shoot 2" at 500 I have them looked at.
RR

If you truly need more than a .30-06, then you truly need to move up.....(way up) in caliber. to the .375 H&H....everything in between is just that.....in between!

When you say, "truly need more than a .30-06," are you meaning more power for larger game? Or more range for the same game species?

I'm sorry, but the OP asked for it.

Very well said

What advantages specifically are you looking to gain? You already have a .338 Win Mag, and I'm not so sure the 7 will outperform so stunningly on bullet drop unless you really are shooting at or past 500 yards. And even then, that's primarily if you're putting a 140-grain 7-mag against a 225-grain .338; the 160-grain 7 hardly stands apart from the same .338 round. And the 140 doesn't outshine a 180 that much.

You can play around with this ballistics calculator and decide which seems to perform better in terms of drop and energy.
http://gundata.org/ballistic-calculator/

If recoil is the problem, on the other hand, then that's another issue, in which case my vote goes to the 7mm.

Do your kids know your playing with their toys, AGAIN!?!?!?! LMAO!!!!!!
That being said, I as well own a 300WM and a .338 Lapua. So Im kinda bias on this story. As the others have said, its a coin toss. Slower, bigger, heavier bullets, higher trajectory arc and more kinetic energy when it gets there or faster, lighter bullet, less trajectory arc, less kinetic energy when it gets there?

those are mine.....hahaha:biggrin:

Thanks guys - so for all intents & purposes, the 7MM & 300WM are about the same out to 600 yds (kinetic energy & ballistics)?

For all intents and purposes, yes - there's about 2" difference in drop at 500 for a 154grn 7mm vs a 180grn 300, and energy is about within 10% - and well over 1500 total. They do shoot differently on the quiet end, but they're both right answers to the same question.