6mm SLR....worth the investment?

[AckleymanII]

My use of SRP in the 6 XC, formed from Palma brass was stellar. With R#17, I had nodes at 3050,3150, and 3270 in a 31" barrel. The 3270 was the most accurate, and palma brass lasted for 5 firings. At 3150, brass life is still clucking along. I put 800-900 rounds on 30 pieces of Pama brass, still shooting 13 of them.

Accuracy was stellar with a RAS tuner with brake.

I used Paul Bike's form die set to form the brass from Palma to XC. I had a long neck to trim off. Instead of cutting the long neck off, I cut a neck .410 long in the chamber, then trimmed brass to a .400 long neck, then throated to ~.145

I saw very, very little leade growth in 900 rounds, and a very faint amount of fire cracking due to R #17?

Here are a few groups where I was adjusting the RAS tunner with brake, 107's with R#17, and 7 1/2's were much more accurate than 450's or Tula's:

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The powder charge is 41.5g of R#17, in a .237, 31" barrel, 107's. 40.5g of #17 is 3150. 41.5g of R#17 blew the primer pockets on the first firing of std xc brass.

Reaching these top end nodes will demand small rifle primers in tough brass with brass having a shorter life than the next node down around 3150 or so.

It will be interesting to watch the 243's with SRP in long barrels with the heavies in .236 and .237 barrels...there MAY be a pressure difference between the two.

Also, will be interesting to see if the small primers will ignite the N160 and H1000 which is very popular....big question in my mind.

 

[urbanrifleman]

My use of SRP in the 6 XC, formed from Palma brass was stellar. With R#17, I had nodes at 3050,3150, and 3270 in a 31" barrel. The 3270 was the most accurate, and palma brass lasted for 5 firings. At 3150, brass life is still clucking along. I put 800-900 rounds on 30 pieces of Pama brass, still shooting 13 of them.

Accuracy was stellar with a RAS tuner with brake.

I used Paul Bike's form die set to form the brass from Palma to XC. I had a long neck to trim off. Instead of cutting the long neck off, I cut a neck .410 long in the chamber, then trimmed brass to a .400 long neck, then throated to ~.145

I saw very, very little leade growth in 900 rounds, and a very faint amount of fire cracking due to R #17?

Here are a few groups where I was adjusting the RAS tunner with brake, 107's with R#17, and 7 1/2's were much more accurate than 450's or Tula's:

[/URL]

The powder charge is 41.5g of R#17, in a .237, 31" barrel, 107's. This load blew the primer pockets on the first firing of std xc brass.

Reaching these top end nodes will demand small rifle primers in tough brass with brass having a shorter life than the next node down around 3150 or so.

It will be interesting to watch the 243's with SRP in long barrels with the heavies in .236 and .237 barrels...there MAY be a pressure difference between the two.

Dude, you are wellspring of kick ass stuff. I wish I lived near you, I would just follow you around.

 

[rafale]

My use of SRP in the 6 XC, formed from Palma brass was stellar. With R#17, I had nodes at 3050,3150, and 3270 in a 31" barrel. The 3270 was the most accurate, and palma brass lasted for 5 firings. At 3150, brass life is still clucking along. I put 800-900 rounds on 30 pieces of Pama brass, still shooting 13 of them.

Accuracy was stellar with a RAS tuner with brake.

I used Paul Bike's form die set to form the brass from Palma to XC. I had a long neck to trim off. Instead of cutting the long neck off, I cut a neck .410 long in the chamber, then trimmed brass to a .400 long neck, then throated to ~.145

I saw very, very little leade growth in 900 rounds, and a very faint amount of fire cracking due to R #17?

Here are a few groups where I was adjusting the RAS tunner with brake, 107's with R#17, and 7 1/2's were much more accurate than 450's or Tula's:

[/URL]

The powder charge is 41.5g of R#17, in a .237, 31" barrel, 107's. This load blew the primer pockets on the first firing of std xc brass.

Reaching these top end nodes will demand small rifle primers in tough brass with brass having a shorter life than the next node down around 3150 or so.

It will be interesting to watch the 243's with SRP in long barrels with the heavies in .236 and .237 barrels...there MAY be a pressure difference between the two.

Also, will be interesting to see if the small primers will ignite the N160 and H1000 which is very popular....big question in my mind.

Yes,the small primers will ignite slow powders like N 160 and N 165 I tried Peterson 243 SRP with a heavy load of N 165 in my 32"Broughton
barrel.

 

[AckleymanII]

rafale, would be great to see some numbers with group sizes.

 

[Laurie]

Also, will be interesting to see if the small primers will ignite the N160 and H1000 which is very popular....big question in my mind.

I can't comment on this with the sixes, but my normal 7mm-08 match load in reformed 308 Palma brass uses 47.1gn N160 and it's performed very well for me over nearly three years now in temperatures between the low/mid 30s F and maybe 80-degrees. (We shoot F and BR year round in England.) I'm still using the 200 Palma cases I started with annealed every fourth or fifth firing and primers are still subjectively as tight in their pockets as they were on starting out. (QuickLOAD says ~60.000 psi PMax on my loads / MVs.)

I've had the cartridge up to a shade over 50gn N165 (ridiculously over-compressed and COALs all over the place) and it still performed fine in pretty cold conditions. In both loads, the Rem 7 1/2BR primer was used.

Somebody did post last year in another thread on LR v SR performance in this class of cartridge that 243 Win long-range loads with a case-full of H1000 didn't perform at all well in the new SR brass - big loss of MV and increase in ES/SD.

 

[Capt. Oblivious]

Its not to hard to run a good case design hard, I had 105s going over 3350fps out of my SLR and im sure I could have gotten close to 3400fps (obviously were not talking about normal 57k-60k preasure here) but over here a good barrel and gunsmith sets me back around $1100 + another $250 for ceracoat and 100 pieces of lapua brass costs around $120 so to get 5 firings out of a case and having to drop a good barrel after 1200 shots is no laughing matter when you shoot allot for that reason Id rather run my SLR at a lower speed/preasure and still have a 100fps over a XC at the same speed. A very good friend of mine ran 105gr hybrids at 3190fps out his 28” XC and the LR brass lasted 4 loads. With the norma brass anything over 3100fps with the powders we had then would kill brass. With VIhta 5series and the new Norma and Hodgon powders that we finally have access to you can get a bit more speed but you will see the same gains in the bigger 6mm cases. Again im not saying one is better than the other (i know the XC is very accurate) but nothing comes free in this game we love

 

[urbanrifleman]

My N160 load will do 3300 FPS pretty easy with my standard 243. Small primers might last longer as I can tell the primers in my Lapua brass are getting looser over time (nothing crazy though), I might get some Peterson SRP to try.

 

[rafale]

rafale, would be great to see some numbers with group sizes.

The test was at 300m with Peterson brass ,CCI 450 ,Lapua 105 grs L ,speed 3250 f/s. 20 rounds (new brass fire forming) gave a waterline
of 28 mm, Inside a 10 ring IBS 300 yds. I found a simple base like N 160 or N 165 are easy to ignite but I'm not sure about double base
powder.

Michel

 

[AckleymanII]

Urban, comparing Lapua SR to LR, you will not believe how the SR brass will survive much longer. The only issue now becomes does your bolt need bushing, as the SR primer does not take the pressures of the Large rifle primer.

Personally, I would take the project slow and easy, stick with Lapua, then go to Peterson for your own education on future projects.

 

[Infrequent Shooter]

I know this is older thread,,,,, 6mm CM or 6SLR? I have some good lapua 243. Is this just 'make work' or should I use lapua 6mmCM and be done with it?

 

[mgdietrich]

Just shoot the 243 as is, or use a 6creedmoor.

 

[One Eye Pete]

The 6SLR is a great cartridge. I went with it a few years back because I like the 30deg shoulder and longer neck than the original 243. It is easy to form and Whidden makes great dies for it. The one drawback is that when you form it with Lapua brass you get doughnuts because Lapua brass is thicker in the shoulder than the neck. It wouldn’t be a problem if you seat the bullet above the doughnut. I ended up using Sig Sauer 243 brass and it worked really well no doughnuts, it’s good brass especially for the SLR.
Im just not a Creedmore type of person I still prefer the SLR for a high capacity 6mm case.

 

[Capt. Oblivious]

There is very little between the 2, the SLR might have a slight edge if you want to use cool powders like N165/N160.
If you want to load up Lapua brass and shoot go with the Creed, if you want something different with a little bit more boiler room go with the SLR and Sako brass.

I have been shooting the SLR since the first video came out on youtube where the guys were shooting 6SLR against a 6.5Creedmoor (if im not mistaken it was forum member Scotty in 2012/2013) and Ill continue to shoot them for a long time coming

 

[clowdis]

I built a 6SLR for competition several years ago but it never met my expectations in the long range game. So I took the barrel off and rechambered to 6BRX for mid range. I won't do another SLR.

 

[Bob3700]

Have shot the SLR since it came out. I was shooting an XC with the 115 DTAC and brass life was short when velocities were a bit over 3000 fps.
The SLR , with slower powders, delivers the velocity with better brass n bbl life. If ur just shooting 105-107 wt bullets, the 6XC is sufficient.
The 6 Creed gets u the same without custom dies and forming brass.

 

[Infrequent Shooter]

Have shot the SLR since it came out. I was shooting an XC with the 115 DTAC and brass life was short when velocities were a bit over 3000 fps.
The SLR , with slower powders, delivers the velocity with better brass n bbl life. If ur just shooting 105-107 wt bullets, the 6XC is sufficient.
The 6 Creed gets u the same without custom dies and forming brass.

Bob37, what are some slower powders that could be used in SLR?

 

[Bob3700]

Bob37, what are some slower powders that could be used in SLR?

VV165 and H1000.

 

[Rtheurer]

I know this is older thread,,,,, 6mm CM or 6SLR? I have some good lapua 243. Is this just 'make work' or should I use lapua 6mmCM and be done with it?

I have stopped using the 6mm SLR. Have now switched to the 6mm Creed. Using Lapua Small Primer brass, H4350, and one of Berger's 109gr Hybrids. First I was up at 3200fps, but came down to 3100fps and its really shooting better than any of my SLR's ever did.

 

[Bodhisafa]

So the 6 creed can shoot as accurate or more than a 6 SLR?

 

[1shot]

I have stopped using the 6mm SLR. Have now switched to the 6mm Creed. Using Lapua Small Primer brass, H4350, and one of Berger's 109gr Hybrids. First I was up at 3200fps, but came down to 3100fps and its really shooting better than any of my SLR's ever did.

This is pretty high praise coming from one of the original shooters of this cartridge. How ya doin' Russ?

Lloyd