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8.6 creed #7252688 08/12/18 12:41 AM
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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.

Re: 8.6 creed [Re: Cleric] #7252722 08/12/18 01:23 AM
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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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Re: 8.6 creed [Re: Cleric] #7252734 08/12/18 01:36 AM
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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?


lf the saying "Liar, Liar your pants on fire" were true
Mainstream news might be fun to watch
Re: 8.6 creed [Re: J.G.] #7252738 08/12/18 01:37 AM
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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...

Re: 8.6 creed [Re: Cleric] #7252743 08/12/18 01:40 AM
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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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Re: 8.6 creed [Re: J.G.] #7252744 08/12/18 01:44 AM
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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


Last edited by Cleric; 08/12/18 01:46 AM.
Re: 8.6 creed [Re: Cleric] #7252746 08/12/18 01:44 AM
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I’m 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 don’t see the performance limits being outweighed by how quiet it is.


Just my rambling thoughts. Carry on.

Re: 8.6 creed [Re: Cleric] #7252748 08/12/18 01:46 AM
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Do they make heavy 338 bullets that will expand at subsonic speeds?



Re: 8.6 creed [Re: scottfromdallas] #7252749 08/12/18 01:48 AM
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Originally Posted By: wp75169
I’m 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 don’t 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

Re: 8.6 creed [Re: Cleric] #7252758 08/12/18 01:54 AM
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.308 Win 55.9 gr water

6.5 Creedmoor 52.5 gr water


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Re: 8.6 creed [Re: Cleric] #7252792 08/12/18 02:23 AM
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I'm waiting for the 7mm Creedmoor so I can trade in my 7-08 for one.



Re: 8.6 creed [Re: J.G.] #7252795 08/12/18 02:24 AM
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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 “a longer bearing surface” 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.

Last edited by wp75169; 08/12/18 02:25 AM.
Re: 8.6 creed [Re: Cleric] #7252797 08/12/18 02:25 AM
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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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Re: 8.6 creed [Re: Cleric] #7252800 08/12/18 02:34 AM
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Any guess on velocity Chad? Say with that 300g bullet. Not subs but maximum velocity at acceptable pressures.

Re: 8.6 creed [Re: wp75169] #7252803 08/12/18 02:39 AM
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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.



Re: 8.6 creed [Re: scottfromdallas] #7252809 08/12/18 02:47 AM
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Originally Posted By: scottfromdallas
I'm waiting for the 7mm Creedmoor so I can trade in my 7-08 for one.


You spelled 7mm-08 Ackley Improved wrong.


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Re: 8.6 creed [Re: ChadTRG42] #7252811 08/12/18 02:49 AM
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Originally Posted By: ChadTRG42
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.


Which is why I questioned the claim of more energy than a .308 out to 400 yards.

Well hold on, now. Run a 178 gr up to 2700 fps and check again.


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Re: 8.6 creed [Re: J.G.] #7252816 08/12/18 02:55 AM
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Originally Posted By: FiremanJG
Originally Posted By: scottfromdallas
I'm waiting for the 7mm Creedmoor so I can trade in my 7-08 for one.


You spelled 7mm-08 Ackley Improved wrong.


You see right through my trolling.



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