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Gunwerks 7 LRM???

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Old 09-13-2012, 09:17 AM
Bronze Member
Join Date: Jan 2011
Posts: 38
Re: Gunwerks 7 LRM???

OK if around 88 G of water is the case, I can believe those velocities. I thought case volume was around 100 G, so that is why I was so puzzled. I have a 375 Ruger and it is a good case design and I am sure it works well necked down to .284. What is your shoulder angle on the 7LRM?

I built a 30-338 Lapua Imp. last year which would push a 210 Berger over 3,400. My finale load was 105 grains of Retumbo at 3,225. Fortunately someone wanted it more than I did so I sold it and built the 7 Dakota Imp.. Sure the Lapua case is a beast but the 7 Dakota will do anything it would do and passes it at 1,000 yds. The 7 Dakota Imp. is much more pleasant to shoot and also more accurate than the Lapua. So I feel the same way you do about choosing over the high performance 30 calibers.
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Old 09-13-2012, 10:37 AM
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Join Date: Jun 2010
Posts: 464
Re: Gunwerks 7 LRM???

Originally Posted by Long Range View Post
Seems like I read some where that the H2o capacity of the 7mm LRM is 88.1 to the top of the neck. Does anybody actually know what the H2o capacity is on a 7mm LRM.
That was me! Heres my post on it.

Most of these questions have been answered in this thread also. I should be getting mine back soon with a 27" barrel so the results should be good.
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Old 03-12-2013, 02:20 PM
Official LRH Sponsor
Join Date: Jan 2013
Posts: 3
Re: Gunwerks 7 LRM???

Hi Long Range Marksmen!
The search is over! I just uploaded a great article about the 7LRM I hope it clears up any questions you may have. Please enjoy!

Gunwerks - Gunwerks 7LRM (7mm Long Range Magnum)
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Old 03-12-2013, 02:37 PM
Official LRH Sponsor
Join Date: Jan 2013
Posts: 3
Re: Gunwerks 7 LRM???

This is an article on the 7LRM. I hope this helps those who are looking for it!

Gunwerks - Gunwerks 7LRM (7mm Long Range Magnum)
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Old 07-07-2013, 03:05 PM
Silver Member
Join Date: Apr 2007
Location: Colorado
Posts: 324
Re: Gunwerks 7 LRM???

I have been able to achieve 3000-3050FPS no problem consistently with the STD 7MMRM and 180gr Bergers and groups very well. I still haven't tried to push the envelope. So far 86 rounds in a single day firing, NO PROBLEM.
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Old 10-25-2013, 02:37 AM
Junior Member
Join Date: May 2011
Posts: 3
Re: Gunwerks 7 LRM???

Hi guys,
I'm looking at building a new rig and have decided on all my components which are, a Stiller Predator, MPI thumbole, Benchmark/Proof Research wrapped barrel. My only dilemma is either going with a 7 STW or a 7 LRM. I'm really interested in the LRM but haven't seen a lot of info or data on it. What would you guys go with and why.
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Old 10-25-2013, 02:29 PM
Bronze Member
Join Date: Jan 2011
Posts: 38
Re: Gunwerks 7 LRM???

Hello 308 Norma Magnum,

This is my opinion, between the 2 cases you chose I would go with the 7 LRM. Much better case design than the 7 STW and would be much more efficient. I don't know a lot about the 7 LRM but everything I have seen about it looks positive.

Another idea to consider is a 7mm Dakota. I designed a 7MM Dakota Imp. reamer that basically uses a 300 Dakota case. Powder capacity is 77.5 to 83.5 Grains of Retumbo and 75.5 to 81.5 of H1000 with velocities from 3060 to 3,260 in my rifle which has a 26 inch tube. I use the 177.5 Caurterucio bullets. The Berger 180's are around 30 fps slower dew to bearing surface. It shoots consistently in the mid 2's at 100 yds. and the groups at 800 yds. are so good I am not going to tell you because I will be accused of lying. LOL

The case is very simple to make. I turn the necks on the 300 dakota case and then form the case to the new dimensions. I have Neal Jones custom dies, so once I form the case I am ready to load and shoot. I set the sizing die so I have a little resistance when I close the bolt. For working up loads I do not fire form but for my long range hunting rounds I do use a fire formed case. Pacific Tool and Gauge has this reamer drawing if you are interested. It is print # 38107, 7MM Dakota Improved.

Good luck in your decision and good shooting.
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