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.300 WSM vs. 7mm WSM

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Unread 02-12-2008, 11:20 PM
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Join Date: Jan 2007
Location: North Idaho
Posts: 668
Did he have bullets in the gun? What kind of bullets was he using cast?
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Unread 02-12-2008, 11:46 PM
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Join Date: Jul 2005
Posts: 1,651

I was in this same delima about 8 months ago, however, I wanted to shoot light bullets out of the WSM Cartridge. I wanted to shot bullets from 100 to 130grn bullets for varminting out to around 800 yards.

I started doing reserch on using light bullets with one of the WSM cartridges. My goals were; to shoot the 110grn V-Max or 125grn Ballistic Tip type bullets, shoot these bullets at high velocity to help out lower BC numbers with these types of bullets, shoot them accurately and be able to use Norma Brass. After doing research, I found a gunsmith who had actually been testing such a rifle with the combination of a WSM case and shooting light bullets.

Richard Franklin discovered the 300 WSM cartridge was capable of producing awesome performances with the lighter bullets as long as the right components were used. Richard designed what is called the 300 Varminter. The 300 Varminter will shoot a 110grn V-Max at 4200fps and the 125grn BT at 4065fps.

Richard, was able to make the 300 Varminter work by using a Bartlien 30", 1-15 twist barrel, Match Tightneck .337 Chamber for Norma 300 Norma Brass, and VV-N550 powder. It is an amazing rifle for varminting out to 800 yards. The 300 Varminter, pushing the 125grn BT at 4000fps, shoots flatter than a 300RUM pushing a 200grn Accubound. However, for shots past 1000 yards, the 300RUM with 200grn Accubond is superior compared to the 125grn BT. But the 300 Varminter is built for varminting out to 800 yards, so it's perfect for it's intended purposes.

After talking to Richard, and owners of the 300 Varminter, it was a no brainer to have one of these rifles built. All who on this rifle say it is an awesome varmint machine. It was perfect for my needs. Many of my varmint hunting buddies use 204's, 22-250's, 220 Swifts, 243's, 6mmBR's, and 6mm AI. My .224 buddies use V-Max and Ballisic Tip bullets from 32grns to 50grns and my 6mm buddies use V-Max and Ballistic Tip bullets from 55grns to 87grns. All of these bullets are shot at very high velocities so the splat factor is awesome.

All of my buddies have made many kills out to 800 yards with the above mentioned rifles, mostly the 6mm's, however, some of the .22 cals have made kills at this range too. The one problem they all have once they start shooting past 500 yards, it's hard to spot the misses. I decided I wanted a .30 cal varmint rifle designed around the lighter bullets, so I could spot the misses much easier. The 300 Varminter was the answer and will be deadly out to 1000 yards. I am looking forward to varmint hunting this year, and I am looking forward to having a rifle that is so different from the norm. A 125grn BT at 4000fps will open the eyes of my local varmint hunting buddies.

Also, the 300 WSM Norma brass is performing well. If I were you, I would go with either the 300 WSM or build a 7mm-300 WSM because of the brass. Anyhow, good luck with your choice.

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Unread 12-28-2008, 04:55 PM
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Join Date: Dec 2008
Location: Florida
Posts: 3
Re: .300 WSM vs. 7mm WSM

Originally Posted by J Mac View Post
Currently I am shooting an older 7mm REM in need of an upgrade. I have been looking at the .300 WSM, but the old 7mm shoots so flat it's hard to change. This addition to the family would be for Elk and long range groundhogs.

I am in much the same place looking for a new rifle. I've found some good info on the fed fusion website they have a comparison chart on there that you can compare different cals. and loads on. of course this is their ammo but it will give you an idea of how the Wsms line up with other cals. Based on this and other research I am going with the 7mm wsm. But to each his/her own. Thats why there are different flavors of pie. Some like chocolate and some pecan and then some just don't like pie. Good Luck and Good Hunting
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Unread 10-12-2011, 04:51 PM
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Join Date: Oct 2011
Posts: 1
Re: .300 WSM vs. 7mm WSM

" Long cartridges may be going the way of long automobiles. For riflemen keen to boost velocity without getting a haymaker punch to the chops, modern short magnums make sense!

-Wayne Van Zwoll-
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Unread 10-20-2011, 05:36 AM
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Join Date: Oct 2011
Posts: 3
Re: .300 WSM vs. 7mm WSM

The 7WSM sure isn't dead in my neighborhood. I defer to Winchester's own ballistics calculator. Winchester Ammunition The 7WSM shoots flatter and hits harder, when using the same size bullets, than the 300WinMag or the 300WSM.

From the above referenced charts:

7mm WSM @500yds 150gr Power Max Bonded -42.3" 1420#

300 WSM @ 500yds 150gr Power Max Bonded -44.1 1219#

300 WinMag @ 500yds 150gr Power Max Bonded -43.5 1238#

These are Winchester's figures not mine. I love this caliber(7mmWSM). Check out the following article about .5MOA groups at 1000yds.http://www.6mmbr.com/gunweek064.html Try it you'll like it.

Last edited by uncledan8950; 10-20-2011 at 05:39 AM. Reason: link to article didn't come through
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Unread 10-20-2011, 10:11 AM
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Join Date: Feb 2010
Location: Smalltown, Virginia
Posts: 481
Re: .300 WSM vs. 7mm WSM

Just bought a .300wsm.. i chose it because of the extended barrel life and bullet selection over the 7wsm. I loooovveee both calibers and let me tell you I had this same debate with myself for about 6 months before finally making my choice. I love big calibers and my best friend has a .300WIN. i have shot it numerous times and the recoil doesnt bother me a bit. I like the insurance (read my signature) that a bigger caliber brings to the table in the case of shooter error. Also if you reload, .300wsm brass is alot easier to find on the shelf. If you go to winchester's website, you will see that they dont even offer factory firearms chambered in 7mmwsm... Some predicted that this caliber would slowly die out.. and it pretty much has (unless your going for a custom build.) There is something about a .300wsm that makes me think it will last as long if not longer than the .270wsm which was a BIG hit! Good luck with your decision.. Make sure you put some serious thought into it and do your research. We can only tell you our opinion, we cant tell you which caliber is right for you!
"...I shoot big cartridges, not because I am ego bound, not because they are needed to kill big game when well placed shots are made, but when an error is made, they will get you out of trouble more often then a lesser round."

--Kirby Allen
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Unread 10-20-2011, 05:45 PM
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Join Date: Oct 2011
Posts: 3
Re: .300 WSM vs. 7mm WSM

I have the 7mm Rem, 300 Weatherby, 300 WinMag, and the 7mmWSM, but I've kicked around the idea of picking up a 325WSM or something even larger. Maybe a 338 or a 340. If something nice comes along....who knows.
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