6x47 Lapua Peterson Brass - first observations

[dstoenner]

Bottom line is WOW.

Along with the A-Tips this was my other Christmas present. I already have enough Lapua 6.5X47 converted to 6X47 to last the current barrel and the next barrel and maybe even a third barrel if I am still shooting F-Class. My practice brass was even more time consuming because I mad it from 6.5 Creedmoor. But it was all range pickup so it didn't cost like the Lapua.

This is my first time ever getting Peterson brass. I thought it would be nice to have some better brass to develop loads extra if it was close to Lapua in quality. I have already given the punch line away because it is really good. So good I did no case prep to load up some Berger 108's for fire forming. Even the neck thickness is almost what I had to turn my Lapua down too after I had sized it down to 6mm.

I took a set of measurements just to see what was in box.

1) I measured 10 at random for case length They all measured between 1.840 to 1.845. All the cases were inside chamfered.

2) I measured 10 at random for neck concentricity right at the lip. All were less than .001 runout. Some the needle wiggled but basically showed 0 runout.

3) Inspecting the inside I found that all of the cases had been back milled to take out any burrs on the flash hole.

4) I use a Sinclair 6BR flash hole uniformer on all of my SR brass. I tried it on this brass. It did contact the bottom but they were so uniform that the 2 I did did not change the case weight. My scale will measure with in +/-.02 grains. Figured I would do the final uniforming after I fire form because this isn't going to change any results on target.

5) Then I weight sorted all 50. 49 fell in a range of 160.5 to 161.1 I had one outlier at 160.2. I am keeping that one back. I then ordered by weight the cases in my loading block and will shoot then lightest to heaviest just to see what I find out.

My other bottom line is that with no case prep at all, I started out better than Lapua after hours of doing all of the case work from 6.5 to 6 just to get started.

Happy New Year all

David

 

[Kracken McGraw]

Bottom line is WOW.

Along with the A-Tips this was my other Christmas present. I already have enough Lapua 6.5X47 converted to 6X47 to last the current barrel and the next barrel and maybe even a third barrel if I am still shooting F-Class. My practice brass was even more time consuming because I mad it from 6.5 Creedmoor. But it was all range pickup so it didn't cost like the Lapua.

This is my first time ever getting Peterson brass. I thought it would be nice to have some better brass to develop loads extra if it was close to Lapua in quality. I have already given the punch line away because it is really good. So good I did no case prep to load up some Berger 108's for fire forming. Even the neck thickness is almost what I had to turn my Lapua down too after I had sized it down to 6mm.

I took a set of measurements just to see what was in box.

1) I measured 10 at random for case length They all measured between 1.840 to 1.845. All the cases were inside chamfered.

2) I measured 10 at random for neck concentricity right at the lip. All were less than .001 runout. Some the needle wiggled but basically showed 0 runout.

3) Inspecting the inside I found that all of the cases had been back milled to take out any burrs on the flash hole.

4) I use a Sinclair 6BR flash hole uniformer on all of my SR brass. I tried it on this brass. It did contact the bottom but they were so uniform that the 2 I did did not change the case weight. My scale will measure with in +/-.02 grains. Figured I would do the final uniforming after I fire form because this isn't going to change any results on target.

5) Then I weight sorted all 50. 49 feel in a range of 160.5 to 161.1 I had one outlier at 160.2. I am keeping that one back. I then ordered by weight the cases in my loading block and will shoot then lightest to heaviest just to see what I find out.

My other bottom line is that with no case prep at all, I started out better than Lapua after hours of doing all of the case work from 6.5 to 6 just to get started.

Happy New Year all

David

That’s great to hear your report on The Peterson brass. I have just loaded 200 Lapua for my new 6x47, that’s probably all the brass for it that I will need also. I was wanting to try some small primer brass on the 6.5 Creedmoor, I think I will try the Peterson now.

 

[Ranger188]

I bought 100 of them also, right after sizing 100 Lapua cases down and turning them.
Didn't know when they were coming out. (Peterson) It was like 2 weeks later.
They seem nice. On the level of Lapua. Like you only measured a few to see how far off they might be.
I think the case manufactures are picking up their quality control because reloaders
expect it and won't buy junk anymore. (Hornady)

 

[dstoenner]

UPDATE #1, even more goodness with Peterson

I took the 49 cases and put them in my loading block with the lightest ones at 1 in order to the heaviest ones at 49. I then did a load with 108 Berger HPBT for a fire forming load After I loaded them I then measured concentricity for the 49 cases. This blew me away. I have never gotten this good an initial loading on Lapua brass. The distribution was:

.001 runout = 33
.002 runout = 11
.003 runout = 5

If I was sure that this load would actually shoot .5 MOA without trying this would be good enough to go to a match right out of the shout.

Now I will fire 5 shot groups and see how they do on target. My guess is good. Saturday I will start on them.

David

 

[Boatschool02]

Thanks.
Please keep us posted.

 

[dstoenner]

Today I was able to get to the range and fire all 49 new cases to fire form them. These were the first 49 rounds down range today. I shot all of these targets set up as I would shot a F-Class match so these targets are not off the bench. Also the box of ammo was shot in the order of case weight, lightest to heaviest. While I did measure concentricity, I didn't short by concentricity. And finally all of this was done at 100 yards.

This was also the first rounds I shot after I changed my barrel back to my older match barrel. Hence why the sighter target is so wild. After I got to where I was ready, I fired the first 5 for group. That is in this picture:

I continued firing both 5 and 10 shot groups. They all basically looked the same. So in the interest of brevity I am showing the last 2 groups which were the heavies. As I noted after group 1 I took .250 MOA down on the scope that these last targets reflect. Shot 9 on target 7 was a clutch shot on my part. I saw what was bulding on the target in the first 8 rounds. I couldn't take the pressure I guess. But even so it was a pretty decent group.

I had mentioned after I had done the concentricity measurement if I knew if it was a good load I could take these to a match. Well these targets bore out that loaded in virgin brass with no prep I would be just as well off as my Lapua based loads with 5 loadings on them.

If all the batches of Peterson are this good we have a winner for Made in the USA. Lapua just became #2 in my eyes. For sure any subsequent brass I might need will be Peterson.

David

 

[PopCharlie]

Purchased 50 6.5x47 Lapua Peterson brass in Dec 2019. I don't weigh my brass, but I do check for runout and neck wall thickness variance. I checked 25 pcs for those measurements. All 25 measured .0005 variance. Runout was .001 or less. I loaded 25 after minimal case prep. ( chamfered case mouth, inspected ) I used 120 grain Berger BT match bullets. Run out on the ogive was as follows:
.000 - .001 16 pcs.
.001 - .0015 9 pcs
Yeah!
I'm so tired of messing with Lapua 6.5x47 brass.
My last batch of 25 pcs of new Lapua measured much worse than this. All 25 pcs had a neck wall variance of >= .0015. Runout was ok at .0015 or less. Not great but usable. I turned the necks down to 13 to get .0005 variance. That cleaned up the runout on a few pcs also. I loaded them with the same bullet, and i got this:
.000 - .001 7 pcs
.001 - 0015 9 pcs
.0015 - .002 7 pcs
.002 - .0025 2 pcs
For me, anything above .0015 runout, I get unpredictable results. Point of impact usually moves.

 

[dstoenner]

@PopCharlie

Does look like your 50 cases came out just like mine. Thanks for your report.

After I shot mine for fire forming, I decided to go ahead and turn the necks. They didn't need it at all except my sizing die is a honed Forster FL die and for what I turned my 6.5 reduced to 6, I needed a .266 but the Peterson would have needed 268. I didn't want to have to separate brass and run 2 different dies. No big deal to turn necks once and not have the frustration later.

I am with you that reworking the Lapua was a chore but not nearly as big a chore as making 6x47 Lapua from 6.5 Creedmoor.


David

 

[Badbob]

Bottom line is WOW.

Along with the A-Tips this was my other Christmas present. I already have enough Lapua 6.5X47 converted to 6X47 to last the current barrel and the next barrel and maybe even a third barrel if I am still shooting F-Class. My practice brass was even more time consuming because I mad it from 6.5 Creedmoor. But it was all range pickup so it didn't cost like the Lapua.

This is my first time ever getting Peterson brass. I thought it would be nice to have some better brass to develop loads extra if it was close to Lapua in quality. I have already given the punch line away because it is really good. So good I did no case prep to load up some Berger 108's for fire forming. Even the neck thickness is almost what I had to turn my Lapua down too after I had sized it down to 6mm.

I took a set of measurements just to see what was in box.

1) I measured 10 at random for case length They all measured between 1.840 to 1.845. All the cases were inside chamfered.

2) I measured 10 at random for neck concentricity right at the lip. All were less than .001 runout. Some the needle wiggled but basically showed 0 runout.

3) Inspecting the inside I found that all of the cases had been back milled to take out any burrs on the flash hole.

4) I use a Sinclair 6BR flash hole uniformer on all of my SR brass. I tried it on this brass. It did contact the bottom but they were so uniform that the 2 I did did not change the case weight. My scale will measure with in +/-.02 grains. Figured I would do the final uniforming after I fire form because this isn't going to change any results on target.

5) Then I weight sorted all 50. 49 fell in a range of 160.5 to 161.1 I had one outlier at 160.2. I am keeping that one back. I then ordered by weight the cases in my loading block and will shoot then lightest to heaviest just to see what I find out.

My other bottom line is that with no case prep at all, I started out better than Lapua after hours of doing all of the case work from 6.5 to 6 just to get started.

Happy New Year all

David

I'm very curious about neck thickness consistency . . did you measure that?

 

[dstoenner]

I'm very curious about neck thickness consistency . . did you measure that?

Badbob,

I don't know how consistent the neck thickness is. All I have is just standard calipers. The few spot measurements I took it was within 1/2 thousandth on a couple of cases. What I do know is that the runout on the virgin cases was less than .001 and the first load was listed in post #4 on this thread. 66% were .001 so it had to be pretty consistent. I ended up turning them just to have them the same neck thickness as my Lapua brass, not because it wasn't consistent.

David

 

[4xforfun]

I just got 100 a couple of weeks ago for my new tube. As luck would have it, the chamber is almost EXACTLY like my old one. Brass that i had ready to load for my old tube would not chamber with a single piece of scotch tape in the back of the case. Perfect fit. I did rudimentary load development with the old Lapua brass. When i received the new brass I weighed a few......they were within 2 Grains of the old Lapua, so I loaded the lower node (37.5 H4350 @v 3040) with the 108 BT and it shoots FANTASTIC!!!

I did ZERO case prep....not even chamfer or trim. Just pulled them out of the box and loaded them!!

WAY HAPPY!!!!

Tod

 

[ExPiney]

I know this thread is old, but...can someone confirm that the Peterson 6x47 is small primer? None of the vendors websites, or Peterson's website, seems to specify. I've looked at some folks load data and see plenty of CCI 450, which is small rifle. Precision Reloading has them listed as large rifle primers (which is mostly why I'm confused).

Thanks

 

[Hoot]

The primer pockets in all the images sure look like SRP. Identical to my own Peterson 6.5x47 cases.

Hoot

 

[ChrisA]

They are indeed small rifle, not sure why PR has them listed otherwise, other than its an honest mistake.

ETA: When looking for a lighter coyote load, I used CCI-450s with RL15, Varget, and IMR-4166 with the Sierra 60gr TMK. Had excellent luck as everything shot well. I also tried CFE223 but had hangfires.

 

[Kracken McGraw]

They are indeed small rifle, not sure why PR has them listed otherwise, other than its an honest mistake.

ETA: When looking for a lighter coyote load, I used CCI-450s with RL15, Varget, and IMR-4166 with the Sierra 60gr TMK. Had excellent luck as everything shot well. I also tried CFE223 but had hangfires.

What is your loaded OD measurement on the 6x47L Peterson brass? Thanks.

 

[ChrisA]

What is your loaded OD measurement on the 6x47L Peterson brass? Thanks.

Virgin brass OD neck diameter with seated 70gr Sierra BK is 0.2720"

 

[Kracken McGraw]

Virgin brass OD neck diameter with seated 70gr Sierra BK is 0.2720"

Thanks much for that. I have a .272 neck chamber, so it would require neck turning for me.

 

[PracticalTactical]

I know this thread is old, but...can someone confirm that the Peterson 6x47 is small primer? None of the vendors websites, or Peterson's website, seems to specify. I've looked at some folks load data and see plenty of CCI 450, which is small rifle. Precision Reloading has them listed as large rifle primers (which is mostly why I'm confused).

Thanks

If you want large primers, just run 6XC brass through your 6x47 Die and length trim.

I could never get remotely consistent velocities from small primers with 6x47 especially in the winter and once I started using 6XC cases and large primers, I never looked back.

 

[urbanrifleman]

If you want large primers, just run 6XC brass through your 6x47 Die and length trim.

I could never get remotely consistent velocities from small primers with 6x47 especially in the winter and once I started using 6XC cases and large primers, I never looked back.

I try to tell people. This is why I suggest the 6xc. Tubb sells Peterson 6xc for $68 a hundred.

Of course, my suggestion is just shoot 6xc.

 

[PracticalTactical]

I try to tell people. This is why I suggest the 6xc. Tubb sells Peterson 6xc for $68 a hundred.

Of course, my suggestion is just shoot 6xc.

Both are really great cartridges but yes both with LRPs are totally the way to go.

Back around 2005-2007 or so when I built my first 6x47L I had problems with hang fires and uneven velocities and that lead me down a path of investigation to resolve. I spoke with Tubbs about it who spoke with Obermeyer about it and I ran into Salazar down at Perry one day. It was unanimous that SRPs would result in the exact problem I was having and LRPs would be the solution.

Knowing what I know now, I would sooner let a friend drive drunk than run SRPs in a 6x47L.