Re: 300 winmag vs 7mm mag
I've shot thousands of rounds from 7mm Rem Mags and it is one of my favorite loadings. I've taken dozens of deer and several elk with it. However, the larger caliber the better when talking about Elk (.338 is even better). I'd choose the 300WM if I had to choose between it and the 7mm RM though.
For a long range round, the Rem Ultra Mag would be even better (300RUM is a smokin Long Range rig). If it was Elk only, I'd say the 338RUM instead, but the 300RUM is an awesome factory round.
The 300WM is a great round and has great over the counter ammo available, it doesn't shoot as flat as the 7mm RM. I setup a Weatherby MarkV in 300WM that shot factory ammo at well under 1moa. It's my dads rifle and I'd borrow it in a heartbeat for deer or elk if I didn't have access to my own rifles.
Either one will do what you want, but consider the 300RUM as well.
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