HOW DOES THE 300 WSM STACK UP AGAINST THE 300 WEATHERBY USING 180 GR. NOSLER PARTITIONS. ANYBODY HAVE ANY EXPERIENCE WITH THE 300WSM. I LIKE THE 300 WBY., BUT MAY ACQUIRE A 300WSM FOR SOME FUN.

I can't imagine there's any notable difference in performance on game with the same bullet. The .300 Weatherby's a good old classic that's been working well for 60 years and will continue to do so. But if you want something new to play with, get the .300 WSM!

MY 300 wby with 26" barrel does 3300 with 180 noslers. I'm guessing a more compact 300 wsm is gonna be 200 fps short of that. (Maybe a little mroe) On game performance and trajectory differences would still be minimal out to 400 yds.

What Kraky said. The Wby is at least 200 fps faster, but the game will never know the difference. All these short magnums were over hyped when introduced ("as fast as a [fill in blank here with medium length magnum's name]). As real world results show up, it's not turning out to be true. They are however, much more efficient, and reach a high percentage of the original magnum's theory with much less powder. FWIW - Dan

I'll take the extra 200 fps. It smacks a lot harder. I can't imagine any advantage of the WSM in the real world of hunting.

Think of it like this: The WBY will launch a 200 grain bullet the same speed the WSM launches a 180. Or it will launch a 180 the same speed the WSM launches a 165. (Roughly speaking, here.)

That's the real advantage. If it's something you want or not is up to you.

Jon A,

If that's the case, skip the whole 300 WBY 300 WSM thing and get the 338 Win. Mag.

Some people care about wind drift.

Since I own both they are within less than 200fps, My Wby has a 26" barrel and the 300wsm has a 24" barrel. I'm almost 80 grs of powder in the Wby and alot less in the 300wsm. To be honest I didn't get the good groups with the 300wsm but got good velocity with 180 gr bullets. I fired pretty close to 250 rd looking for the right load, tried 150 and 165 gr bullets. (switch scope,bedded and trigger job)I was at the range one day and the guy next to me had a 300wsm firing factory ammo 180gr and was getting groups 1/2" to 3/4". That was the case with most of the 300wsm I'd seen at the range. I'd even tried some of his ammo. Well hopefully today I will be picking up my new rebarrel (ss match 5r 1/12 twist) 300wsm rifle and see how it will do. I don't plan on selling my 300wby,30-378wby nor my 30-338 in favor of the 300wsm, I just added to my hunting rifles. Tom

I think the 300wsm and the 300saum were to be similar to the 300 win mag. The competition for the 300wby is the 300rum.

From identical barrels (if such thing were possible), there would be a tad over 200 fps difference in the two at similar pressures.

With the "standard" magnum case, you get at least one more round in the magazine (if this is important to you).

Also, with the standard magnum, rounds will actually move from the magazine into the chamber without manual intervention, as some WSM rifles refuse to feed reliably (again, if this is important to you).

As to whether there is any practical difference in the field, I would suspect that practically no game struck in the same place with the same bullet propelled by a .300 Savage would act much differently (once again, if this is important to you).

I think the WSM pretty well falls out with bullets over 200gr when compared to the Weatherby. As to the 300 Savage comment, I can make this observation; You haven't seen very many animals taken a 300 Weatherby. The difference between and a 06' is pretty dramatic, so I suspect the difference with the 300 Savage is even more so. Thoghts? jorge

For $388 you can buy a Wby Vanguard in .300Wby at Wal-Mart in Arizona.

Stonecreek,

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As to whether there is any practical difference in the field, I would suspect that practically no game struck in the same place with the same bullet propelled by a .300 Savage would act much differently (once again, if this is important to you).

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I've seen quite a few animals taken over the years, and many of those were with 300 Weatherby magnums. There is a vast difference between a 300 Savage and a 300 Weatherby. I've twice seen animals literally blown off their feet and body slammed to the carpet like they were tackled by The Incredible Hulk , from 180 grain Noslers out of a 300 Weatherby. It's not a magic cartridge, a 300 Winchester, 300 RUM or anything else with similiar velocity will do the same thing. But let's face the facts, close to 4000 foot pounds of energy at the muzzle tends to get the attention of live flesh