I have a Weatherby MK V in 7 MM REM MAG. I have a line a 300 Weatherby which I am interested in at a good price. Are these calibers too similar to notice a difference? I would like to use the 300 Weatherby on big bears.

The weatherby will shoot flatter and deliver a heavier bullet at extended distances. It will definitely recoil more then the 7 Rem mag

Cost of ammo is a consideration if you don't reload. 300 weatherby ammo is big $$$$

If by BIG BEARS you are talking brown and grizz then I would jump up to a .338 win mag which will recoil about the same as a .300 WBY but deliver a 250 gr. slug. Much better for hunting bears. Great round for moose also, I have killed quite a few with it.

if you like your 7mm and you want big bears i agree you should go with the .338 winchester magnum.

The .300 Wby. Mag. Is a greater preformer than the 7mm Rem. Mag., and yes, people use the .300 Wby. Mag. for hunting the great bears. Good luck.

I am a 300 fan there is a big dif in 7mm and the 300 wb the down range energy is the dif.338 is all so a good gun

If big bears are on the menu ,I prefer the .338" bullets.

As much as I love the 338 as THE classic all around 1 gun for the North American continent, I must confess my love for the original "super 30" the 300 WbyMag. From a handloaders table you cant convince me that a 200grain Xbullet fired stoutly from a 300Wby wont do anything a 338 with a 250 will do, you just cant convince me.

If price is no matter, then go for it. With the cost of todays premium standard mag ammunition (Fed Prem/Vital Shok, Win Sup, Hornady etc) vs the cost of Weatherby ammo for the 300 and below, there isnt that much difference anymore.

A full boat 300Wby from a throated gun is MUCH more gun than the 7Rem ever thought about being. Theres just no comparison. Sure the Wby whomps on you more, but be a man and take it. Gonna shoot BIG guns you need to act like a BIG boy!

One thing about the 338 vs the 300Wby, EITHER will be a fine gun. Personally if I were picking a BIG bear gun it would be a .375 H&H for work under 300yds and a .378 Wby for longer shots. But seldom will you shoot a BIG bear that far. Its just to dangerous and many guides wont let you do it. THEY are the ones who have to wade in and sort the pieces out if he doesnt fall at the shot. You can NEVER kill a pissed grizzley (and they ALL become that way as soon as you put a hole in them) too dead!!!

Good luck,
RA

Of course if you really want to stay with the .308" bullets the 300ultramag offers slightly more punch than the 300wby.With .338" bullets the 338ultramag offers noticeably more punch than the 338winmag and offers flatter trajectory as well for longer ranges.