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I am thinking of a new build on a short action and am wondering if anyone has experience with the 6mm super long range? It sounds like a great round for target/varmint with the ability to push heavy 115gr bullets at reasonable fps (3000) without being loaded to the max! Seems to me, barrel life would also be good and the brass is easily formed by lengthening the neck by changing shoulder to 30 degrees on .243 win cases.
Just a thought
I don't have experience with that round but it sounds like it will perform similar to the 243AI but with the longer neck of the 6mm Rem.
I think that is going to be my next build. A lot of info on wwwsccurateshooter.com
Try this for 6mmSLR info: http://www.6mmar.com/Super_LR.html
Check out nodakoutdoors.com and check their forum. A friend of mine just built one and posted a lot of info on it. He is a pretty good guy to ask questions.
The only advantage I can see is it would be cheaper to use 243 brass over 6.5x47 lapua brass. The round sounds like another someone re-inventing the wheel.
how dose it compare to the 6mm rem AI?
HOW DOES IT COMPARE TO THE 6-06 ACKLEY
copied from http://www.6mmar.com/Super_LR.htmlQuote:
Originally Posted by Cover Dog
Conceptually, the 6mm Super LR is like a long bodied 6XC (case body about .120" longer). The Super LR has a long neck (.321" vs. the .263" long neck of the parent .243 Winchester case). The Super LR also has a 30 degree shoulder angle vs. the 20 degree shoulder angle of the .243 Winchester parent case. The Super LR has a case capacity of approximately 54 gr. of water weight vs. 49 gr. of water capacity of a 6XC and 55 gr. of water capacity for the .243 Winchester.
Testing has shown that the Super LR has the capability to run the 115’s up around 3100 fps without issues. If you like to shoot the 105-108 gr. class of 6mm bullets, the 6mm Super LR can also push them up in the 3150-3200 fps range
+1......Quote:
Originally Posted by 82boy
HOW CAN IT BE BETTER THAN THE 243 WHEN IT HOLDS LESS POWDER.
LOOKS LIKE A WASTE OF TIME AND MONEY.
It's a wildcat and loads haven't been pressure tested. They're likely running it well in excess of the SAAMI pressure for the .243 and possibly beyond the 65kpsi SAAMI max for any cartridge. You also have to look at barrel length that they're testing with. Most long range rifles run a very long barrel to maximize velocity.
Depending on what "pressure signs" you're looking for, they may not show up until you're well into scary.
How can you make a 51 mm long case out of a 47mm long case?Quote:
Originally Posted by 82boy
That's what they were trying to do with the 243 wssm.They ran pressures so high you needed a hammer to get the bolt open.You don't see Winchester or Browning pushing them any more.Cooper doesn't either.I had a varmint stalker,very nice gun and accurate,but had pressure issues.
The .243WSSM goes over the edge quickly. Rather than pressure signs showing and getting worse with incremental powder increases, it goes from no pressure signs to signs of being way over pressure in one powder increment.
Im the guy from over on nodakoutdoors that has one of these crappy cartridges. Ill just say if youve never shot this round you should just go sit in the corner and color. This cartridges maybe a reinvention of the wheel but what is any cartridge? I can easily run my 6slr up to 3200fps in a 24" barrel. But i have a barrel node at 3150fps. I dont get pressure signs until im up past 3200 a ways. These numbers are with the 105g hunting vld.
So if you're thinking of a round where you dont have to fireform brass and is scarry accurate with the lowest es/sd numbers that ive ever done with cheap win brass give the slr a try before you knock it off the list.
When i was looking for a new cartridge the cm came up but i chose the slr because of the extra work involved in the cm. I just load and go.
The cm is only slightly larger case cap than the 6slr. You're buring a hair more powder with a shorter neck and most guys are still gett 3-4000 rounds through their cm. Im hoping for similar in the slr. The cm is blown out the slr is crushed down. Take your pick. Either one is an awesome little round. But ill bring you back full circle with fire forming. I hate fireforming.
Xdeano
NO! It has been over pressure all along! It finely just showed to far over!Quote:
Originally Posted by helotaxi
That is why we have books that have limits not to exceed. And calipers to measure cases for expansion.
I never said it wasn't over pressure. The point is that it doesn't show the signs of being over pressure until its WAY over pressure. You have to rely on the books and the chronograph, not "reading" cases.Quote:
Originally Posted by Blue Avenger
Here is a pic for a comparison.
http://i35.photobucket.com/albums/d1...6mmSuperLR.jpg
243, 6mmCM, 6mmSLR
Again the SLR is formed by compressing a 243win case down to 30 degrees and about .1 longer neck. The 6CM is a blown out case. It's formed basically the same way as a 243AI would be. (Fireformed). The cool thing about forming the SLR is that you can actually get .0015 head spacing with virgin brass by specing it off your chamber, so no fireforming. I resize my brass by doing a .0015 shoulder bump so it's consistent every single time. It loads and extracts like silk.
I'm a poor lazy bastard and would rather blow powder and bullets on what it's intended to be used for and not have to worry about wasting barrel life, and brass life.
But then i've got a buddy that's shooting a 115g out of his 243 at 3100fps, with no pressure signs, just a powder that he's cooked up. Unreal.
xdeano
Im real interested in the slr for my savage project. Suggestions for a turn key barrel?
Thanks!
You are talking a 6CM barrel?
You mentioned .25 MOA on your 3000 round barrel. If you don't mind sharing, what load?
Do you use standard or magnum primers with the H1000?
Thanks
I'm using standard LR primers in the SLR with H1000 too, i do get an extra 100fps of velocity with a mag primer but my results are no more consistent. It's a nice tight powder column and ignition is just fine.
xdeano
Is it for sale? Or are you shooting it also?Quote:
Originally Posted by DGD6MM
Sorry, i misunderstood.Quote:
Originally Posted by DGD6MM
I thought you meant, that you had one already chambered available...my bad
Seems like most are going with the 4831. Has the H1000 worked better for you?Quote:
Originally Posted by Xdeano
Im hoping to get my SLR in a few weeks. We'll start working up the setup then.
We already formed some winchester brass. It was so easy. A few had a bit of wrinkle just below the shoulder even with plenty of lube. I guess we do have to do have to rely on a bit of fire forming?
Yeah i got a little wrinkle in my brass also. Nothing to worry about, it'll blow out and it won't mess you up with load development. I like the H1000, it is a little cooler so barrel life will be extended a little more. I don't have the velocity with it though. If you want velocity go with the H4831sc or H4350. both are good velocity powders.Quote:
Originally Posted by Tonysnoo
xdeano
Thanks
I have my action and barrel back chambered and ready to go, so I'm working on the stock. Hoping to fire it in the next couple of weeks. I'm going to play with 105 amax's and 115 DTACs with the 4831sc and the H1000.
I see lots of recomendations on bullet seating depth from .050 jump to .015 in the lands. That will be an interesting bunch of tests. Going to wear a barrel out just figuring out where to run it....LOL
A fellow I met at a local show. He works with for a nearby com college and their gun smith program.
Brunos had a kreiger barrel in stock. A reamer from 4D and we were set. Ill know more when we start shooting it.
Im hoping to play out at 1000 as well as some long range varment clankers.
I got to shoot five loads today (50 shots) out of my slr
3 with 105 amax 2 with 115 dtacs . So far the nod goes to the amax with 43 gr of 4831sc.
In fairness to the dtacs, i think i was getting shaky since they were the last of bunch. Ill have to do a dtac only day
The gun makes me smile :)
I've now got about 150 rounds down range. I'm still learning things. We have yet to chrony it. I've shot a long range silhouette and a 1000 yard match with only a little testing. It does better than I anticipated.
My goal was to build an entry level shooter. Other than the kreiger barrel it still has the savage action, accu trigger and accustock. I've mostly shot DTACs and Amaxs with 4831 per recommendations, but now we are going to experiment with a bunch of different recipes and a chrony.
Firing virgin brass at 1K isn't a problem. They shoot basically the same as a second fire brass.
Try some of the 105g Berger Hunting VLD with 47.4g H1000 it gives me 3050fps at 75F. But shoots bug holes. Work up a load of course.
Still haven't gotten my hands on any of the hybrid bergers yet. That might be interesting.
xdeano
Are you into the lands or jumping?Quote:
Originally Posted by Xdeano
I'm jumping .008 in anticipation of .010 due to barrel wear. As of lately, i'm still at .008 jump. Barrels doing well. I'm very impressed with barrel temp. I can shoot 5 rounds quick and my barrel isn't even warm. I can't do this with any of my other guns, and i can attribute that to the h1000.
My load:
Berger 105g Hunting vld
H1000 -47.7g
Rem brass trimmed to 2.034
Fed 210M primers
24" barrel suppressed.
1000 ft asl.
xdeano