What is the parent case of the creedmoor family, 6.5, 6mm and 22?

22-250 then .250-3000

30TC which is based off of 300 Savage, if I'm remembering correctly. I think wiki normally states the patent case...check my memory.

I think you are correct Judd but the Creedmoor cases can easily be made from the 22-250 or 250 Savage cases the resultant cases will be a little short necked though but will work.

The 30TC was a case without a cause but worked out well for its offspring if we are remembering correctly. I remember a guy at a gun counter trying to sell me on the 30TC instead of the 308 ICON I was buying. He was trying to inform me about the superior advantages of getting more velocity from the Hornady factory loads than the 308. He just dropped his jaw and looked dumb struck when I told him to compare the 30TC to the 308 superformane loads from Hornady since they were loaded with the same technology.

And here I thought it was from scratch.

.22 creed might just spin the "spinner" if it hasn't been buried in the ground.

Illegal cartridge on steel less than 400 yards. So I'll set it at 400 and see what you can do.

I have a gun magazine from a few years (or more) back, and the writer was reviewing the relatively new (at that time) caliber, the 6.5 Creedmore. He said the base case was the 250 Savage AI. Some folks say it was the 30 TC as the base case, but since the Savage case predates it, I'll assume the Savage AI case is the parent.

But, back to the 22 Creed, is there any advantage to it over the 22-250 or the 220 Swift, other than a twist rate that allows for longer heavier bullets? Is this a caliber that really needs to exist? Why would a fellow want or need the 22 Creed. Same question for the 22 Nosler.

Makes more velocity than a 22-250.

I don't know, but making a SWAG, that case geometry says it's more efficient, and a lower ES than the 220 Swift.

That makes sense, though the 22-250 AI should be just about the same case, I'd think. The reason I asked is because the Swift pushes the caliber about as far overbore as reasonable. I didn't consider efficiency/ES.

There was a time that I considered rebarreling my 220 to a faster twist, but heck, I think I'll just leave it alone. For what I do, which is hunting and paper punching, a fast twist 220 isn't going to give me a better all-around caliber than the 260 that I normally use. Those big hogs are sometimes hard to put down.

I bet that's right.

When you Fire 22-250 in a 22 Creedmoor it not only increases the shoulder angle it also blows the case walls out to a more straight walled case so it's a double Ackley Improved of sorts.

In the Hornady eighth edition manual it states the 6.5 Creedmoor was based off the 30 TC. I reckon they would know.

I can't see much point in arguing about the origins of the case, but what was the parent of the 30 TC. I doubt that it was a brand new case, and the fact that you can fireform a 22-250 case in the 22 Creed chamber might make one think that the 250 Savage AI might be in the parentage. And, of course, it predates the 30 TC. My guess is that the 30 TC case was, in fact, used as the parent case of the Creedmore, but one generation prior to that the 30 TC was a modification of the 250 or maybe even the 300 Savage.

Don't suppose it really matters.

Don't think it really matters but I think the 30TC is offspring of the 300 Savage.

There are not that many cartridges that have been introduced in say the last 30 years that don't have a parent cartridge, probably further back than that.

The Creedmoors are some good cartridges, just with what I have in the stable to shoot I have no plans to buy one any time soon. Perhaps when I shoot out the barrel on my 22-243 I will screw on a barrel in 22 Creedmoor to replace it.

I flat love this cartridge. It has good brass life and reasonable barrel life for the amount of performance that you get from a heavy 22 cal bullet. Better velocity than 22-250, slightly better than 22-250AI and better feeding performance with no need to fire form. Better throat life than 220 Swift and comparable performance with lots of room to seat out in short action magazines.

Have you ever tried Reloader 16 in this cartridge? I have heard that R26 does admirably, but was curious if R16 was a good fit as well.

Yes I have I did both a work up up Reloder 16 and Reloder 23 at the same time. Both shot very well but speeds were lower once I hit max( even a little over max) than what I was getting with Reloder 26 so I did not persue any further.

What sort of speeds are you seeing with R26?

With the load I settled on 3480fps with 80.5 Berger. The 80 gr ELD is also that speed.
I got to 3600 fps but primer pockets got loose after 3 reloads.
With both Reloder 16 and 23 I had sticky bolt at 3450fps

Very nice!