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Discussion in 'Long Range Hunting & Shooting' started by ann brezinski, Jan 5, 2017.
what are your thoughts on the gunwerks 7 mm lrm cases.
That you are limited to ONE source of brass.
That your rifle may not like that brass.
That the brass may become unavailable.
That YOU may not like the brass.
That a 7 SAUM, 7SS, 7RM, 280AI, 7WSM, 284 will pretty well match or pass it AMONG OTHERS.
That a 7mm is a great caliber but why build it on a case with such limited availability.
Any SUPPOSED superiority pales in comparison to these things IMHO.
My 7 SAUM is running harder than many LRM guns and it's a LOT shorter, more efficient and while brass availability for the SAUM SUCKS it's still a better situation than the LRM.
I agree with most of this.....not everything is all bad At least you can buy brass NOW and you can buy it in quantity. I had one built before the 28 Nos came out. Wish I had waited......
And if you don't reload, you will be spending $5 a trigger pull buying ammo from Gunwerks. While I have no doubt this is a fun cartridge, I think there are many others (listed above in a post) that will accomplish the same end goal without the worries of, everything listed in the above post.
The risk vs reward doesn't make sense to me on this caliber, at this time.
That it's little more than a gimmick.
As is already stated above you limit yourself to one source of brass and reloading components, load data, and all for performance that is no improvement over existing 7mm cartridges.
I have one I love it it performs great at 3095 but if I had it to do over it would be a 28 nosler.
If I can't get mine to shoot anything other than 180 hybrid it may become a 28 nosler. 2950 with the 180"s. Guys on site are getting that with 7RM.
I load mine with 71.5 grains of H-1000 under a Berger 180 Hybrid and it shoots .3's. I'm glad I did the build.
I've got a 7LRM build in the works. I'll share some of my decision process.
I knew I wanted a 7mm to sling heavy bullets way out there. Specifically the 180 Berger at around 3100 FPS, but I also wanted to be able to play with the 195 as well.
I reload. So no restrictions on cartridge based on availability of factory loads. Because OP is asking about the case I'm going to ASSume you do as well.
Then I looked at case capacity as a measure for power. And because I didn't want to deal with belts, I discarded those, which rules out the RM, WBY and STW.
This is from another thread here about two years back. I think this is mudrunners list
280 Ackley Improved
7mm Rem Mag
Then I examined the remaining options. According to my reloading books and what I could find online the RSAUM and WSM were pushing 175 LRAB around 2800fps at a maximum, which is respectable, but because I wanted to shoot 180's and 195's they would be just slightly anemic. If you look online you'll find people pushing them harder but, I don't really care to do that with my reloads.
This left me the Nosler, the LRM and the RUM.
The rifle is intended to be a backpack hunting rifle, so I wanted to keep the weight down. Not that any cartridge remaining would kick any less, but shooting a RUM out of a ten pound rifle doesn't sound fun. Call me a wimp if you want. Also I've heard less than positive things about component life in RUMs
So now I'm left with LRM and Nosler. I went with the LRM because of what I perceive to be the better case design and the reported efficiency of the chambering.
Thats just my opinion. Good luck
Best of luck, I hope it works well for you.
I was a lot more ready to try different things before the last 15 yrs of brass shortages.
I have been running RUMs, WSSMs and SAUMs since the 2000s.
After Remington essentially pooped on the RUM and SAUM and Winchester killed the WSSM, I am afraid of anything I can't find brass for in at least 3 different sources. You can build the best gun in the world and if there is no brass or the brass available doesn't agree with your loads then its ISSUES.
10 yrs ago I would have been like "Heck yeah build the newest super turbo magnum that whatever little company is making brass for". Then brass became more like GOLD THAN BRASS and I have started shying away from the odder cases.
I my self looked hard at the 7 lrm, but final decided on a 7 mm Blaser, both give the same ballistic as the 7x61, and I used the same S&L M65. My purpose was to duplicate the 7x61 but without the belt.
The bolt face needed to be enlarged for the Blaser cartridge, which I do not think is necessary for the Gunwerks 7 lrm. Cases are more expensive, "cost of exotic" but the Blaser brass from Norma is a strong one, I do not know about the lrm brass from Hornady, but do have good results with other Hornady brass.
Anyone else notice he always starts these same threads asking the same basic thing, never comments again, and then starts another one a month later asking the same basic thing, but a different cartridge?
Yes which is why I don't bother with detailed replies.