Sorry To Double Post, But:

Smith brought it up, asked me what I thought.

I think it is an awesome round, but am worried about reloading supplies. Brass, and dies.

Is the brass used 375 ruger, or is there production brass?

Hi Casey,

Gunwerks created the 7 LRM by necking down the 375 Ruger AND moving the shoulder back creating a longer neck. They offer fully formed brass.

If you were to try this yourself you would need quite a few forming dies but it is possible. There is no shortage of 375 brass. It is the only brass that hasn't moved at our local Sportsman's in months. I did buy two boxes but the other two are still there.

An alternative is to just neck down the case. I did this recently with 150 pcs of 375 Ruger brass.
It took 7 steps plus neck turning to make the finalized brass. Once I made a few cases I ordered a reamer from Pacific tool and gauge.

Dan sold me a slightly used 30" lilja 1 in 9 twist 6 groove. Had to cut off 5/8" to rechamber the 7 stw. I am doing my own chamber jobs now!

Man does it shoot! Short neck isn't an issue. Getting 3200 fps with a 180 Berger hybrid and RL-33. Checked it last week at 3 pts on the rams. While very windy the comeups were correct and it only drifted 10-12" in a gusty 15 mph crosswind at 500 M.

The 7 LRM has my attention.
Hope to shoot one in the future.

How strong is the 375 ruger brass? Anywhere as tough as 338 Lapua? I see that it has a max pressure rating in the 62K PSI range and a .532 bolt face with about 100grs H2O capacity.
I like the route AZ shooter has taken, but do not think I can back away from the 7mm/338LM yet, but the big bolt face required is a pain. Any gains over the ultra mag? I have actually had great luck with the RUM with the heavier bullets. Seems like a rifle looney case to me, but at least with STW performance with no belt sounds pretty good.

Thats pretty good info, as usual!

My smith called them, $132 for 100 pieces of brass, which I didn't find out of line.

I think I am going to go down that line as I wasn't really jazzed about going with the standard 7RM. I wanted something a little sexier.

Have you tried the 7LRM with H1000? I have 4-5 pounds on hand and would love if it is a applicable powder with good speed and accuracy.

EddBo,

It is pretty much the same at the 7mm Dakota or 7 STW. 7 Rum would produce more especially with that 29 3/8" barrel.

I made it because I wanted a shorter case with more power than the 7 Rem mag. I had a box of 375 Ruger on hand and decided to see if I could neck it down with the dies on hand.

I never bought a single custom die for it. The RCMs and 375 Rugers share same shoulder diameter and angle. Have a 338 RCM bushing FL die that Whidden made for my 338 RCM packages. I was able to use it with different bushings and some messing around with shortened 7 RUM FL and seating dies to get down to finalized dimensions. Even used the shortened 7 RUM seater die to seat bullets in beginning. Later ran the 7/375 chamber reamer into the body of a 7mm Rem Mag Redding competition seater die for an even better seater. (7 RUM also shares same shoulder angle but shoulder is .010" larger) Body bump/shoulder angle is accomplished with a 375 Ruger FL die.


Casey,

I put some H-1000 load data in my documents:

7 LRM 180VLD's at 3145 through a 27 1/2" tube with 72.8grs of H1000 and a 215m

7LRM 72.8grs. of H1000 gives 3145fps with a Berger 180VLD out of a 28" 5C Broughton tube.
---------------
Gunwerks load is 72 gr of H1000 Fed gm215 m primer with 180 VLD
--------------------------------------------------------------

Did try H-1000 with the first 7mm/375 which was a rechambered 7mm Rem mag . It has a 23 1/4" barrel and was only a test bed.

Used moly coated 168 Berger hybrid classic with H-1000:
78=3075 shoots very accurately
79=3090
80=3115
81=3135 was also quite accurate
82 3205 vel jump/over the top/some bolt lift resistance

Went to RL-33 with 180 VLDs but short barrel didn't impress much:

moly coated Berger 180 target VLDs, RL-33.
81= 2988
82= 3010
83= 3040 most accurate
84=3073
85=3124 opening up
86=3140 slight bolt lift resistance

The finalized load for this rifle was 83 grs of RL-33

The longer barrel shined with RL-33. It also is running 83 grs and with 3200 fps the longer barrel makes a difference.

---------------------------------------


I can see making a 338/375 with the 375 Ruger as Rick Bin did. You could do all work with a 338 RCM die set.

Gunwerks will sell you the brass. Mine runs a 180 VLD at 3035 with 72 grains of H1000. Scarey accurate. I am a OK shot and shot a 4x3.5 size group at 800 yards. Bbl is 25.5 long. It's a great round. Let me know if you have any more questions or if I can help you out any.

What is the felt recoil like in comparison to a 7RM? Would it be a decent round for a lighter weight build? 7lb rifle?

I have a break on mine and haven't shot it without the break. I'm guessing just a shade more than a 7mm REM

Joel,

What is the weight on your rifle? Lets see it (although I am sure you have posted it) as well as some stats. My rifle will be as follows:

Stiller Predator Action
26" #4 fluted Brux 1:9 barrel
McMillian Game Scout w/EDGE
Timney trigger, 24 oz
I will probably top it with the new line of Zeiss scopes, probably the 5.5-15.

Casey everything I do is from a iPhone. Haven't figured out how to post pictures from it. If you send me a email address ill be glad to send you some pictures. Weight is 9 pounds 14 ounces with the heavy Nightforce scope.

Joel's rifle:

Thanks Marty.

That's a sexy rig.

You ought to see its twin it's a TI action Proof research carbon BBL LR1200 in 300 WIN MAG

Ill take some pics of it tonight and see if Marty will be nice enough to post them here also.

Download the Photbucket app, you can directly upload your pictures from your phone, and copy and paste the links here. Super easy.

I'd rather do it this way. That way I get to see his stuff and call dibs before you guys do... grins

Thanks Casey. Ill give it a try tonight. Marty pictures coming soon.

Are those Talley LW rings/bases? You didn't need a 20 MOA cant to get to 1000?

Nope. Don't need a 20 MOA but at that velocity with the 180 VLD is right at 20 MOA which is one revolution on the Nightforce. Zeroed at 200 yards 20 MOA gets me to 1000

Big 7's are monsters with good manners....hell, feed them right,zero them proper, and you don't even need a turret to get to 600...

I run H1000 in my 7 lrm. I just picked up some 180 hybrids to try. I'd been working with the VLD hunting but Gunwerks told me they run the hybrids so I thought I'd give a few a try. Hope to have time to load some tonight.

Bb

Here are pics of the TWINS. Thanks for the info Casey






This Newfie moose was killed at 667 yards on Video with the 7 LRM and a 180 VLD

And this B&C woodland bou on the same hunt. 7LRM

And one more:

Nice Rifle!

Thought I would chime in. I'm on my 4th loading using the original 375Ruger headstamp 7LRM brass and it's holding up well. I did load some up to 73.6grs of H1000 to get to 3240fps. Very accurate, but extractor marks and occasional stiff bolt lift. Those brass had loose primer pockets at the second loading...too hot! The rifle shoots amazing.

Have these LRM guys never heard of Art Mashburn?

I went up to 72 g of H1000 and a 180 in my lrm and started getting a little bit of stiff bolt lift and brass flow into the ejector hole. Too bad because the groups were really starting to come together with that load and the hybrids. They clocked 3108 from my 26" rock 8.5 twist. Despite the brass flow and the bolt lift the primer pockets are still holding up well.

Bb

It's interesting to compare.....I'm not seeing very much difference assuming same bullets and equal barrel lengths...

Anybody have the 7 LRM case length available? And the trim to length? Wondering if it's the same as the .375 Ruger, or a little shorter.

Gunwerks has the 7 LRM brass at 2.514" and Nosler had the 375 Ruger brass at 2.58". http://www.nosler.com/375-ruger

I just ordered the 7mm LRM reamer, die set, and brass from Gunwerks. Aaron was more than helpful and sent me an email with a short write up on the LRM and reamer specs after talking with him. Here is part of that article.

"The development goal behind the design of the 7LRM was to achieve balance, not extreme performance. Really, shooting at animals beyond 1000 yards is a tricky proposition�not for the novice. The Gunwerks crew lives for long range gear and shots, but the number of animals killed at or beyond 1000 can be counted on one hand. Maybe this is because we film our hunts, and can�t afford a miss or bad shot placement.
We need to balance the requirement of a minimum velocity threshold of 2000 fps at 1000 yards with a hunting weight bullet, and wind deflection numbers that will allow 30-50% uncertainty in our wind estimation against recoil, cost, and case life for reloading. We wanted a cartridge of modern design that fit in a standard magazine box that will take any game we want to chase in all conditions-basically the ultimate hunting cartridge.
First off, we settle on the 7mm diameter bullet because of the high ballistic coefficients of hunting weight bullets from 160 to 180+ grains. Then we look for a case to base the cartridge from to save thousands in tooling costs. The 375 Ruger from Hornady is perfect. The 375 is very similar to the genius 30 Newton cartridge from 100 years ago. This cartridge case fits a standard magnum bolt face without modification, and there is no rebated rim as on the massive Ultra Magnum case. We fit the neck length to the longer 180 grain bullet, with the overall case length of 2.5 inches. With a 30 degree shoulder and minimum body taper, we achieve nearly 3100 fps velocity with a 180 grain bullet. If one compared the LRM case against two of our other favorite cartridges the 6XC and 6.5-284 Norma, you will notice some striking similarity."

My plan is to take a brand new M70 EW 7 Rem Mag and have it rechambered into the 7 LRM. After having a 338-375 Ruger built, I just had to have a
7mm-375! I want the LRM for correct headstamped brass and no stepped forming. Think it will make a great all around NA rifle less the big bears.

Gun Is Almost Done! Any Other Load Ideas? Any Powder Besides H1000?

I know it is a larger boltface and there may be magazine concerns but I've had the hankering to neck the 300 Norma down to 7mm..... It should be in the same class.

RL25,Retumbo. I found that the slower stuff worked better with bullets of 160 gr and up.

RL22 was excellent with 120 TTSX(3550fps), and 140's at 3350 or so.

With 150 gr bullets you should do well with IMR7828.

bob,

I'm Looking At Using The 175 Lrab. I Figured R25 Had To.Come Into The Mix.... Just Hadn't Heard It In Use Anywhere... Care To Share Some Data?

Anybody know if the 7lrm reamer will clean up a 7RM chamber?

Mine liked retumbo too. I actually got better speed with retumbo even with the same charge as H1000 it was weird given that 1000 is supposed to burn a bit faster.

Bb

Eddy, here ya go...

http://site-media.net/gunwerks/7LRMarticle(1).pdf


W

firstcouse I can't because I have never used the 175 in the LRM...cause I never had one.

But I did have a 7mm Dakota which is very much the same thing as the LRM but with a slightly different head size. I basically used the Barnes Manual data in working up loads for the Dakota and found the velocities very much spot on.

When I was working with the Dakota I noticed that RL22 did very well with lighter bullets but when I got to bullets of 150-160 gr, the powders with burning rates like RL22,H4831 etc did not do as well in accuracy and velocity...I went to RL25 and it worked very well with 150-160 gr. bullets.

I never got to the 175's in the Dakota.

However I was on the website for the Gunwerks 7mm LRM and noticed their top charges with the 175 and H1000 were within a grain or so of what I use in the 7mm Mashburn Super...and velocities were similar as well. Bottom line is I think these cases are very much the same and if you find RL25-175 data for the 7mm Dakota I think you could back off and work up with the LRM and end up at about the same place. That's how I would do it.

I also think you will find that Retumbo and/or RL25 will be excellent and capable of a bit more velocity than H1000 but not by much.

RL-33 worked with 180s in my 7mm/375 yielding higher velocities than H-1000. Trying to find some Retumbo to try next.

AZ forgot your work with R33...

Another good one but never used it myself.

N570 should be a winner.

Ross, If You Have Any Extra R33, Id Love To Buy A Poubd.... I Know You Really Think Highly Of Iit

Anyone Used Us869? I Know You have Ross.... That's Where I Got The Idea.

Sure wish this site had a e-mail alert. Missed the questions till today.

Sure Casey I can sell you a pound of 33. Also a pound of 869.

I can swing by soon. Javi hunting Friday and Saturday with some friends. Might be able to find time in the afternoon this weekend. e-mail me for possible meeting times.

Ross

Ross has all the dope on this stuff!

Casey he will make it easy-peasey for you.