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7mm/375 Ruger Project 7LRM

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Old 03-31-2011, 04:29 PM
Silver Member
Join Date: Aug 2010
Location: Reno Nevada
Posts: 191
Re: 7mm/375 Ruger Project 7LRM

Thanks All, I think I have a great starting point.
I did also get help from the boys at Gunwerks they were very helpful.
The barrelled action is already for being glass bedded. (only got here yesterday) If it shoots as good as it looks it will be a screamer.
Oh and Len if you read this,it looks like it will push the 168 bergers easily past 3200FPS.....
Thanks again everyone
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Old 04-01-2011, 08:58 AM
Silver Member
Join Date: Mar 2005
Posts: 203
Re: 7mm/375 Ruger Project 7LRM

I own a Gunwerks LR 1000 in the 7MM LRM with the new G7 scope. Mine shoots 180 VLD at 3035 it is a mild load but scary accurate. THe Gunwerks load is 72 gr of H1000 Fed gm215 m primer. Hope this helps. If yours is half as accurate as mine youll be VERY VERY VERY happy. Gunwerks has got a real good thing going and I will be a customer for a long time. Not to mention Aaron and Mike are very helpful and the customer service is second to NONE. Thanks Gunwerks.
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Old 04-01-2011, 09:49 AM
TMR TMR is offline
Join Date: Mar 2006
Location: Elma, WA
Posts: 534
Re: 7mm/375 Ruger Project 7LRM

3035 with a 180 seems low. Especially with that much powder. The 7mags I build for guys run 3000 - 3050 with 180's using 70gr of Retumbo in 26 - 27" tubes. I figured this case would run them faster, something similar to a 7-300 Win Mag.
Travis Redell
R Bros Rifles
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Old 04-02-2011, 02:51 PM
Silver Member
Join Date: Jul 2008
Posts: 279
Re: 7mm/375 Ruger Project 7LRM

The 375 Ruger has approx 99 grains of capacity. You will loose 4-5 grains when you neck your brass down but that still leaves you with 93- 95 grains depending on the brass of course. That is right inline with the capacity of a 7mmSTW. I would think starting loads for the STW would be a safe starting point. There is a lot of data out there for the STW. Depending on your max OAL the useable capacity could be even better due to the shorter case length of the Ruger reducing encroachment into the powder capacity.
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Old 01-16-2012, 04:02 PM
Junior Member
Join Date: Nov 2011
Location: Walcott, WY
Posts: 15
Re: 7mm/375 Ruger Project 7LRM

This is a very helpful thread to me as well. I am trying to have a 7 lrm built by my local gun smith and was looking for some strting info. What have you guys found out now lately? Hop you had time to shoot it.
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Old 01-16-2012, 05:54 PM
Silver Member
Join Date: Mar 2007
Location: Dallas,OR
Posts: 367
Re: 7mm/375 Ruger Project 7LRM

I believe that the GunWerks load is 72grs. of H1000 lit with a 215 primer. My load is 72.8grs of H1000 lit with a 215m coal 3.455" for 3135fps at 12' from the muzzle. I will advise you to start lower and work your way up.
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Old 01-16-2012, 07:06 PM
Gold Member
Join Date: Mar 2006
Posts: 885
Re: 7mm/375 Ruger Project 7LRM

In my 7-300win AI which is close in capacity ,I have gotten the most velocity and least pressure withRetumbo
Extremely accurate as well.
I Have worked up to 83gr retumbo with 162 amax with no high pressure signs.
I got 3220fps with80gr then my chrono batt died before I could test the higher loads.
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