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Kaleb,

The 6.5 Creedmoor case is actually most similar to the .250 Savage RCBS Improved. The RCBS improved rounds used 28-degree shoulders instead of the 40-degree shoulders of Ackley Improved rounds, and 28 is very close to the 30-degree shoulder on the Creedmoor. It's close enough, in fact, for .22-250 brass to fire-from perfectly, with no trimming required, in a 6.5 Creedmoor chamber when using the Cream of Wheat method.


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John,

I ran several fire-formed 250 Ackley cases through a 6.5 Creedmoor sizer, and out came usable cases. I also fired some 250 Savage ammo loaded with 87 grain HP-TNTs meant for the 250 Ackley in a 6.5 Creedmoor, and though accuracy was rather poor, nicely formed cases resulted. Funny thing......the rifle still shot minute of elk vitals at 100 yards sort of groups. So I suppose if a 6.5 Creed shooter found himself on a hunt with no ammo, and a supply of 250 Savage, he could continue onward! eek

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Billy,

Handy to know! Especially if you're Travis.

Any guess on the BC of .25 TNT's from a 6.5 barrel?


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Hee hee. The BC was probably not so great!

The 250 in a 6.5 test was probably not the smartest thing I’ve ever done. We’ll just add that one to a long list!

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Just making sure this thread is at least partially about me.

Carry on.




Travis


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...aren't they all.....in a loving way naturally..

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Originally Posted by Mule Deer
Dennis,

I have heard rumors that the .243 works real well when necked up to .30 caliber, but it doesn't seem to be what you're looking for. (Have heard it kicks pretty hard.... :-)


The Ackley version kicks less though

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Another magic Ackley characteristic!


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Originally Posted by Mule Deer
Or even a .263 Express, which Ken Waters developed in 1956, the year after the .243 Winchester appeared, and a long time before Jim Carmichel came up with the 6.5 Panther. The .263 Express was also simply the .243 necked up to take 6.5mm bullets.


Just goes to show a "new" cartridge may not actually be. wink


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I wonder what Parker Otto would think about all this?


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Originally Posted by Mule Deer
Another magic Ackley characteristic!


Their attributes are endless...

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Build a 6MM Creedmoor. Factory brass is available from GA Precision for 62 cents each.

Drives 105gr bullets at 3100fps with ease. Perfect fit in a short action. Bullets will not seat below the neck/shoulder junction with room to spare in a short action.


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Is there an advantage of the 6mm Creed over 6-6.5x47?


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Originally Posted by RDW
Is there an advantage of the 6mm Creed over 6-6.5x47?



A little case capacity I guess.

The funny thing about the 6.5-47L case. Guys are running them to stupid velocities. Read a blog about one target shooter running his 6x47L to 3250 with 115 DTACs. With about 10 grains less capacity than a 243 which really can't even do that. He claims that the small primer cases handle pressure better. I can't imagine what his pressures are with that load but certainly far about 65,000 PSI.

I really wanted to do it on a 243 case but I am intrigued by the 6mm Creedmoor. Did not know brass existed.

I'll have to see the availability of reloading dies and order a reamer...

Last edited by dennisinaz; 08/02/15. Reason: wrong word

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I got my 243 brass today and ordered a reamer (different project) and asked about the 6mm Creedmoor reamer. Was told 12-14 weeks out!

I will order some brass and seat a bullet to see what I need for freebore and neck. No reamer until then!


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I ordered some dies. I will see how brass turns out before ordering a reamer.


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From Kenny Jarrett

243 Catbird

68-70 gr. bullet ................... 4100 f.p.s.
85 gr. bullet ........................ 3800 f.p.s.
95 gr. Nosler Partition ......... 3500 f.p.s

.243 Improved

70 gr. Nosler bullet ......... 3650 f.p.s.
85 gr. Sierra Spitzer ......... 3450 f.p.s.

Last edited by andrews1958; 08/09/15.
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And this suggests???

If the catbird is that much faster than a 243 AI then it must be based on a much bigger case.


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It's based on the 270 Winchester case, necked down and blown out with a 35 degree shoulder.

I know this cause I just read it on Jarretts website smile




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It helps him sell more barrels.

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