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#7252688 - 08/11/18 07:41 PM 8.6 creed
Cleric Offline
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So looks likes Kevin b is developing cartridges again (he did it at aac with the 300bo). The 8.6 creed will be the creed necked up for 338.

Some benefits are longer bearing surface for longer bullets than 338 federal, great sub sonic performance with higher grain Bullets than 300bo, higher energy inside 400yards than 308 with supers.

Not sure what I think but with some of the new subsonic bullets being developed and more energy than 300bo with subsonics it could be interesting.

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#7252722 - 08/11/18 08:23 PM Re: 8.6 creed [Re: Cleric]
FiremanJG Offline
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Higher energy inside 400 year than a .308 with what .308 bullet at what speed?

In other words, what .308 load is he comparing it to?
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#7252734 - 08/11/18 08:36 PM Re: 8.6 creed [Re: Cleric]
kmon1 Online   content
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I do not see it making enough speed for longer .338 bullets for them to expand at 400 yards reliably, unless long range accubonds or something like that.

300 BO as a cartridge I do not see as that much. The cartridge is a copy of the older 300 Whisper s it not?
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#7252738 - 08/11/18 08:37 PM Re: 8.6 creed [Re: FiremanJG]
Cleric Offline
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Originally Posted By: FiremanJG
Higher energy inside 400 year than a .308 with what .308 bullet at what speed?

In other words, what .308 load is he comparing it to?



Not really sure. Saw something like 2500fps on a 155 grain bullet out of a 12in barrel...

Going to be interesting to see when real numbers get out...

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#7252743 - 08/11/18 08:40 PM Re: 8.6 creed [Re: Cleric]
FiremanJG Offline
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Originally Posted By: Cleric
Originally Posted By: FiremanJG
Higher energy inside 400 year than a .308 with what .308 bullet at what speed?

In other words, what .308 load is he comparing it to?



Not really sure. Saw something like 2500fps on a 155 grain bullet out of a 12in barrel...

Going to be interesting to see when real numbers get out...


So only comparing SBR .308?
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#7252744 - 08/11/18 08:44 PM Re: 8.6 creed [Re: FiremanJG]
Cleric Offline
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Originally Posted By: FiremanJG
Originally Posted By: Cleric
Originally Posted By: FiremanJG
Higher energy inside 400 year than a .308 with what .308 bullet at what speed?

In other words, what .308 load is he comparing it to?



Not really sure. Saw something like 2500fps on a 155 grain bullet out of a 12in barrel...

Going to be interesting to see when real numbers get out...


So only comparing SBR .308?


Not really sure. He says it should be released soon. Not sure what final numbers will be until it gets officially released



Edited by Cleric (08/11/18 08:46 PM)

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#7252746 - 08/11/18 08:44 PM Re: 8.6 creed [Re: Cleric]
wp75169 Online   content
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Iím really not following the craze of extremely underpowered heavyweight bullets like the 300 BO. If the creedmore matches 308 case then why build a 338 that will run heavier bullets than the federal and perform poorly? The 338 federal and the 338-06 really seem to have that market covered. Nobody is trying to run heavies in those because they lose performance quickly. I guess I donít see the performance limits being outweighed by how quiet it is.


Just my rambling thoughts. Carry on.

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#7252748 - 08/11/18 08:46 PM Re: 8.6 creed [Re: Cleric]
scottfromdallas Offline
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Do they make heavy 338 bullets that will expand at subsonic speeds?
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#7252749 - 08/11/18 08:48 PM Re: 8.6 creed [Re: scottfromdallas]
Cleric Offline
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Originally Posted By: wp75169
Iím really not following the craze of extremely underpowered heavyweight bullets like the 300 BO. If the creedmore matches 308 case then why build a 338 that will run heavier bullets than the federal and perform poorly? The 338 federal and the 338-06 really seem to have that market covered. Nobody is trying to run heavies in those because they lose performance quickly. I guess I donít see the performance limits being outweighed by how quiet it is.


Just my rambling thoughts. Carry on.

Think some similar thoughts were said about the 300bo. Not sure of the real differences from 338fed



Originally Posted By: scottfromdallas
Do they make heavy 338 bullets that will expand at subsonic speeds?

In work. Hornady is working on them with Kevin

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#7252758 - 08/11/18 08:54 PM Re: 8.6 creed [Re: Cleric]
FiremanJG Offline
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.308 Win 55.9 gr water

6.5 Creedmoor 52.5 gr water
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#7252792 - 08/11/18 09:23 PM Re: 8.6 creed [Re: Cleric]
scottfromdallas Offline
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I'm waiting for the 7mm Creedmoor so I can trade in my 7-08 for one.
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#7252795 - 08/11/18 09:24 PM Re: 8.6 creed [Re: FiremanJG]
wp75169 Online   content
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Originally Posted By: FiremanJG
.308 Win 55.9 gr water

6.5 Creedmoor 52.5 gr water



Exactly. While it may be more efficient in the 6/6.5mm range the loss of capacity at .338 shooting bullets with ďa longer bearing surfaceĒ than the federal would make it a real slug. The federal and 338-06 perform excellent in the 210-225g range. Try throwing a 250-275 with less case capacity in the creedmoor.


Edited by wp75169 (08/11/18 09:25 PM)

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#7252797 - 08/11/18 09:25 PM Re: 8.6 creed [Re: Cleric]
ChadTRG42 Offline
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Well, the Creedmoor solved some issues that the 260 Rem had (260 is based on the 308 win). The cm moves the neck back quite a bit to fit and feed the long high bc bullets, where the 260 has trouble doing and fitting in the mag. So,a larger .338" diameter round would seat back further in a cm, to allow it to fit and feed better in a short action. The 338 federal has this issue with the 300 grain bullets. I could see it allowing better heavier bullet options. But velocity would be slow. Subsonic would be great.
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#7252800 - 08/11/18 09:34 PM Re: 8.6 creed [Re: Cleric]
wp75169 Online   content
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Any guess on velocity Chad? Say with that 300g bullet. Not subs but maximum velocity at acceptable pressures.

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#7252803 - 08/11/18 09:39 PM Re: 8.6 creed [Re: wp75169]
scottfromdallas Offline
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Originally Posted By: wp75169
Any guess on velocity Chad? Say with that 300g bullet. Not subs but maximum velocity at acceptable pressures.


My guess would be 2000 fps from a 22" barrel. I have a 338 Federal and my fastest I ever pushed a 225 grain bullet was 2540 fps with a 225 DeepCurl.
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