6mm Creedmoor ES help (Primer Selection)

[Patrick Comte]

Okay, I want to run some things by fellow shooters. I am running a 6mm Creedmoor, and my ES are somewhat high (25 fps range). Though they aren't always high, it'll be one or two rounds that make them go crazy, though this shows up at 1000+ yards.

My load is:

Lapua 6.5 Creedmoor cases necked down to 6
CCI 450 Primer
H-1000 @ 46.8gn 3130 fps avg
105 Nosler RDF ~.060 off lands

My brass prep is:

Amp Annealer
Deprime
Lee Collet Neck Die
Redding Body Die
Trim, Chamfer, Deburr
Clean with Lyman Green Tumbling media
Check flash holes for debris
Prime
Charge (Chargemaster, then a gem pro 250, keeping +/- 1 kernel accuracy)
Seat Bullet (+/- .0005)

I don't want to change powders, I have good velocity and incredibly good barrel life with this powder. I have changed neck tension, brass type, and bullets. Is there any possibility the primers could be the issue? Lapua uses small primers in their Creedmoor brass, and I am running a lot of H-1000. Are there any hotter small rifle primers than CCI 450's? I'm going to try Fed 205M's, Rem 7 1/2's, and Sellier and Bellots Small rifle primers to see if there are any changes, though I'd like to see some first hand experience if there is any. Let me know what you guys think.

Thanks!

 

[LRPV]

I have a buddy shooting one with RL-26. Switched from 450's to BR2's and was happy with the results.

 

[Patrick Comte]

I have a buddy shooting one with RL-26. Switched from 450's to BR2's and was happy with the results.

Where does RL-26 fall on the burn rate chart? Also, is RL-26 still a 'dual base' powder? I'm trying to find a updated chart, though I'm having a hard time finding one.

 

[Kyle87]

This is a burn rate coefficient chart that I have.

 

[LitLBoy]

Am I reading this right --- 7828SSC is the slowest powder listed on this chart?
LitLBoy

 

[Patrick Comte]

7828 is the fastest listed on the chart at least that's how I read it.

 

[LitLBoy]

What the hell was I thinking?
LitLBoy

 

[savagedasher]

With just a few rounds being off I would think you have a case volume. Capacity problem .
The next time you practice when you get big change set that case aside . You can sort with speed also . Good luck Larry

 

[Riesel]

7828 is the fastest listed on the chart at least that's how I read it.

7828 is the FASTEST of the SLOW burning powders as listed on that chart.

 

[jaygorski]

Okay, I want to run some things by fellow shooters. I am running a 6mm Creedmoor, and my ES are somewhat high (25 fps range). Though they aren't always high, it'll be one or two rounds that make them go crazy, though this shows up at 1000+ yards.

My load is:

Lapua 6.5 Creedmoor cases necked down to 6
CCI 450 Primer
H-1000 @ 46.8gn 3130 fps avg
105 Nosler RDF ~.060 off lands

My brass prep is:

Amp Annealer
Deprime
Lee Collet Neck Die
Redding Body Die
Trim, Chamfer, Deburr
Clean with Lyman Green Tumbling media
Check flash holes for debris
Prime
Charge (Chargemaster, then a gem pro 250, keeping +/- 1 kernel accuracy)
Seat Bullet (+/- .0005)

I don't want to change powders, I have good velocity and incredibly good barrel life with this powder. I have changed neck tension, brass type, and bullets. Is there any possibility the primers could be the issue? Lapua uses small primers in their Creedmoor brass, and I am running a lot of H-1000. Are there any hotter small rifle primers than CCI 450's? I'm going to try Fed 205M's, Rem 7 1/2's, and Sellier and Bellots Small rifle primers to see if there are any changes, though I'd like to see some first hand experience if there is any. Let me know what you guys think.

Thanks!

You don't think Hornady tested the 6 Creed with both LRP & SRP, of course they did, that's why they went with a LRP. Now you have to find the hottest small primer and hopefully it'll work.

 

[jaygorski]

Shot these 2 groups Wed, ESs of 26 & 28, SDs of 9 & 10, probably shouldn't worry so much about ES, a low SD is better(10 or lower they say)
http://i.imgur.com/Aeq5XWe.jpg?1

 

[Tommie]

Do you want to reduce ES or do you want to continue using H1000? IMO you're running a very slow powder for this case capacity.

 

[Stuey]

Try the BR2's.

 

[TAJ45]

The H1000/primer combo may well be the culprit. However, with the occasional erratic shots, I've read here that installing a new firing pin spring has smoothed things out also.
Please let us know what you find out.

 

[Kiwi Greg]

This is a burn rate coefficient chart that I have.

That chart is a little screwy ??

No way RL33 is as slow as shown on that chart or RL50 for that matter, 20N29 is the slowest by quite a bit over those two.

Back to the OP, the small mag primers don't/won't spark up that powder as well as say a Fed 215 or CCI 250.

They also won't provide the velocity that the big magnum primer will with the same load.

Playing with neck tension can help with ES.

 

[BradY]

That powder is too slow to be sparked up in that size case by a SRP. Years ago myself and a few others chambered 260 improved/260AI rifles for f class shooting. We used lapua 308 Palma cases necked down to 6.5mm and fireformed. I used H4350 and CCI450's and had success. The others used RL 19 and 22 and H4831sc and often struggled with odd shots high and low. Must admit in this time I enjoyed quite a fair bit of success in this time. However it wasn't until they went back to 260 lapua LRP brass that their rifles really started to hammer. While my rifle and load was shooting well, I did experiment with H4831sc as well and same again, the results were hot and cold. And I got caught out badly in the middle of a competition where the barrel fouled and was throwing wild shots. Back to the original load and it was fine. We put it down to the small primers not being able to ignite the powder as it should have and causing the problems. I would guess in a case that isn't far off that sort of size that H1000 will be too hard to ignite by a SRP. The hottest ones I have seen are rem 7.5 and CCI 450. If they wont do it, your going to have to go back to LRP.

 

[Patrick Comte]

So, I am working on a new load. Im working up H4831sc. I think the amount that I'm running will ignite as it should. I currently have 205M primers. Its in the 44.4-45 grain area. I agree that H-1000 is slightly slow for the case.

 

[Mastershot]

I run 40.7gr of H4350 with a 105 hybrid at 3068 fps

 

[65 fan]

Okay, I want to run some things by fellow shooters. I am running a 6mm Creedmoor, and my ES are somewhat high (25 fps range). Though they aren't always high, it'll be one or two rounds that make them go crazy, though this shows up at 1000+ yards.

My load is:

Lapua 6.5 Creedmoor cases necked down to 6
CCI 450 Primer
H-1000 @ 46.8gn 3130 fps avg
105 Nosler RDF ~.060 off lands

My brass prep is:

Amp Annealer
Deprime
Lee Collet Neck Die
Redding Body Die
Trim, Chamfer, Deburr
Clean with Lyman Green Tumbling media
Check flash holes for debris
Prime
Charge (Chargemaster, then a gem pro 250, keeping +/- 1 kernel accuracy)
Seat Bullet (+/- .0005)

I don't want to change powders, I have good velocity and incredibly good barrel life with this powder. I have changed neck tension, brass type, and bullets. Is there any possibility the primers could be the issue? Lapua uses small primers in their Creedmoor brass, and I am running a lot of H-1000. Are there any hotter small rifle primers than CCI 450's? I'm going to try Fed 205M's, Rem 7 1/2's, and Sellier and Bellots Small rifle primers to see if there are any changes, though I'd like to see some first hand experience if there is any. Let me know what you guys think.

Thanks!

i think your problem may the .060 off the lands.try lowering the powder charge and going .010 in.do a latter test over a crony and see what you get.numbers are usually better in than out of lands.

 

[ngb1787]

Honestly, extreme spread isnt too bad, you should average about 22, what is ur sd? If ur under 8 ur not doing bad.