7mm mag vs 7wsm?

[alpha6164]

I have read hours on this topic and still cant make up my mind for a new project. The goal is to have a 1500yard rig and would like to use the Berger 180 VLD or Hybrid bullets. I have three options

1) 7wsm on a long action
2) 7wsm on a short action
3) 7mm rem mag

Here are some questions:

-Since i want to use the 180g bullet variety can these be loaded to mag length on a short action?

-If the above requires long action does the wsm case itself support the heavy bullets to get them going at least 2900ft/sec?

-If i have to use a long action, should i just go with a rem mag anyways or there is any inherent advantage of using a 7wsm in a LA?

-how is brass availability between the two?


Thank you.

 

[turbo54]

Re: 7mm mag vs 7wsm?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: alpha6164</div><div class="ubbcode-body">I have read hours on this topic and still cant make up my mind for a new project. The goal is to have a 1500yard rig and would like to use the Berger 180 VLD or Hybrid bullets. I have three options

1) 7wsm on a long action
2) 7wsm on a short action
3) 7mm rem mag

Here are some questions:

-Since i want to use the 180g bullet variety can these be loaded to mag length on a short action?

<span style="color: #990000">Yes, though a bit more performance can be had with the long action.</span>

-If the above requires long action does the wsm case itself support the heavy bullets to get them going at least 2900ft/sec?

<span style="color: #990000">You should be able to easily reach 2900fps with a 180 in a short action.</span>

-If i have to use a long action, should i just go with a rem mag anyways or there is any inherent advantage of using a 7wsm in a LA?

<span style="color: #990000">The 7RM can ultimately outperform the WSM, but not by much</span>

-how is brass availability between the two?

<span style="color: #990000">Both readily available most places</span>


Thank you.
<span style="color: #990000">You're welcome </span>
</div></div>

Personally, I dig the short action...

It allows faster and easier bolt manipulation, I WON'T hit myself in the face by the bolt, and 10 round magazines are available.

Anyone considering a 7WSM should also consider the 7 Remington SAUM, and also the 7-300WSM (300WSM or 270WSM necked to 7mm). The 7SAUM fits a short action the best of the bunch, but unless you wanna shell out $2/piece for Nosler brass, it's tough to get brass for, as the Remington stuff is on perpetual backorder.

 

[alpha6164]

Re: 7mm mag vs 7wsm?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: turbo54</div><div class="ubbcode-body">

Personally, I dig the short action...

It allows faster and easier bolt manipulation, I WON'T hit myself in the face by the bolt, and 10 round magazines are available.

Anyone considering a 7WSM should also consider the 7 Remington SAUM, and also the 7-300WSM (300WSM or 270WSM necked to 7mm). The 7SAUM fits a short action the best of the bunch, but unless you wanna shell out $2/piece for Nosler brass, it's tough to get brass for, as the Remington stuff is on perpetual backorder. </div></div>



Thanks for the answers. I have looked at the SAUM and 7/300wsm just trying to stay within cartridges that brass is more readily available and trying not to do too much brass prep by making wildcats.

 

[rusty815]

Re: 7mm mag vs 7wsm?

The short mags can each do what you want. Personally I would go with the 7RSAUM for efficiency and easier feeding from a short action, with a very close second being the 7/300WSM to make it easier to find brass.

 

[dpodgurs]

Re: 7mm mag vs 7wsm?

I have done several builds with 7mm Rem Mag. For all intensive purposes it was a fantastic 1000+ round. I ended up opting out of the rifle and went to the 308 because even with reloading, the cost of running the system was expensive to say the least.

I'm selling one of my R700 in 7mm Rem Mag. It's an ADL which is a great start if you plan on doing a semi-custom build.

-------------
Dave

 

[alpha6164]

Re: 7mm mag vs 7wsm?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: rusty815</div><div class="ubbcode-body">The short mags can each do what you want. Personally I would go with the 7RSAUM for efficiency and easier feeding from a short action, with a very close second being the 7/300WSM to make it easier to find brass. </div></div>

The 7RSAUM does seem like a winner but the idea of brass becoming harder and harder to find kind of turns me off. So i am pretty much i think stuck between bread and butter 7wsm or 7rem mag. All other inputs appreciated.

 

[excess]

Re: 7mm mag vs 7wsm?

I was thinking of a very similar build, and i decided most of those choices were just a little too much of a compromise for me. I already had a DTA SRS so I just bought a barrel in 7 WSM for that. Plenty of room in the mags there, and not a huge commitment in case I decide I don't like it.

 

[Jaxdialation]

Re: 7mm mag vs 7wsm?

I'm thinking through the same kind of build. I'm not going to rush it, but I'm starting to wonder if the 180 bergers are worth all the trouble.

 

[rusty815]

Re: 7mm mag vs 7wsm?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: alpha6164</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: rusty815</div><div class="ubbcode-body">The short mags can each do what you want. Personally I would go with the 7RSAUM for efficiency and easier feeding from a short action, with a very close second being the 7/300WSM to make it easier to find brass. </div></div>

The 7RSAUM does seem like a winner but the idea of brass becoming harder and harder to find kind of turns me off. So i am pretty much i think stuck between bread and butter 7wsm or 7rem mag. All other inputs appreciated. </div></div>

What about the 7/300WSM? finding brass for the 7WSM is becoming difficult as well, and with the 7/300WSM you can use 300WSM brass, which is more plentiful.

 

[alpha6164]

Re: 7mm mag vs 7wsm?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: rusty815</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: alpha6164</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: rusty815</div><div class="ubbcode-body">The short mags can each do what you want. Personally I would go with the 7RSAUM for efficiency and easier feeding from a short action, with a very close second being the 7/300WSM to make it easier to find brass. </div></div>

The 7RSAUM does seem like a winner but the idea of brass becoming harder and harder to find kind of turns me off. So i am pretty much i think stuck between bread and butter 7wsm or 7rem mag. All other inputs appreciated. </div></div>

What about the 7/300WSM? finding brass for the 7WSM is becoming difficult as well, and with the 7/300WSM you can use 300WSM brass, which is more plentiful. </div></div>


It looks like a great round but i just have never necked up or down a case and not sure how much more brass prep i gotta do to make that happen.

 

[RobG]

Re: 7mm mag vs 7wsm?

A straight 7RM with Retumbo will get the 180's to 3k easily. Brass is readily available and will feed just fine from AI mags. I used Rem brass which worked out just fine with the usual prep. There is Norma and Nosler brass if you want to step up to something "better."

Or you could do a 7mm/300wm. Neck down 300 win mag brass and you are all set. I was reading about it myself and 3100+ with 180's seems entirely possible. Plus, if the 195 comes out, imagine it pushed by Retumbo at 3k. I'm thinking it should work fine all the way out to 1500

 

[rusty815]

Re: 7mm mag vs 7wsm?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: alpha6164</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: rusty815</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: alpha6164</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: rusty815</div><div class="ubbcode-body">The short mags can each do what you want. Personally I would go with the 7RSAUM for efficiency and easier feeding from a short action, with a very close second being the 7/300WSM to make it easier to find brass. </div></div>

The 7RSAUM does seem like a winner but the idea of brass becoming harder and harder to find kind of turns me off. So i am pretty much i think stuck between bread and butter 7wsm or 7rem mag. All other inputs appreciated. </div></div>

What about the 7/300WSM? finding brass for the 7WSM is becoming difficult as well, and with the 7/300WSM you can use 300WSM brass, which is more plentiful. </div></div>


It looks like a great round but i just have never necked up or down a case and not sure how much more brass prep i gotta do to make that happen. </div></div>

Its as simple as running new brass through a FL die, no extra steps really necessary.

 

[alpha6164]

Re: 7mm mag vs 7wsm?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: rusty815</div><div class="ubbcode-body">

Its as simple as running new brass through a FL die, no extra steps really necessary. </div></div>

Is it really that simple? So I would have a 7wsm full body die and run the 300 wsm brass thru it and that's it? No trimming, neck turning etc?

 

[turbo54]

Re: 7mm mag vs 7wsm?

No. You'd need 300WSM bushing die set.

Choose appropriate 7mm bushings

Instead of 300wsm seating stem, you'll need a 7wsm one.

Remember, this wildcats parent is 300wsm, simply necked down to 7mm. The 270wsm and 300wsm cases are identical. If a schmuck chambered/fired a 270 in a 300 rifle, it would not be dangerous, only inaccurate. A 300 won't chamber in a 270 because the neck/bullet is way too big. If the 7wsm case were also identical, it could also be fired from a 300 rifle safely, but it could potentially be chambered/fired in the 270, which would be DISASTER!!! (.284 bullet in .277 bore). Thus, the 7wsm shoulder is further forward, preventing chambering in the 270wsm.

Anyway, Redding will set you up with the dieset you need, as will Forster.

No trimming (to begin with...you'll still need to trim occasionally just like any cartridge), and no neck turning, provided your chamber neck size is correct.