Obsolete Rifle Rounds with Very Famous Offspring

The threads on Cartridges that should (die, live forever, be loved against all reason, be hated unconditionally) forever got me thinking.

Many cartridges spring from interesting family trees, and it has intrigued me how some of the most popular rounds were derived from rounds that are now obsolete, or nearly so.

Several that come immediately to mind (and please correct me where I am mistaken):

38-55 => 30-30
6mm Lee Navy => 22 Swift
30-03 => 30-06 (sort of a stretch since the 30-03 was basically a prototype)
222 Remington Magnum => 223 Remington (Aka 5.56 NATO)
30 TC => 6.5 Creedmoor (I wonder about this since I have also seen the 6.5 CM described as a necked-up 250 Savage AI).

Any others?

 

The .30-03 was the official US Army cartridge for 3 years. I wouldn't call it a prototype. It would have served longer if the lightweight, spritzer trend had occured later. I would absolutely consider it the parent of the .30-06, and it's amazing that the rather conservative Ordnance Department acted as soon as it did.

 

One of The most famous ones. .22-250 came from .250 Savage

 

6mm PPC and so in turn 6.5 Grendel have as parent the .220 Russian. But the .220 then has 7.62x39 as parent, hardly obsolete, so does it count?

 

Well, isn't the 1888 7.92x57 the grand daddy of all the "30-06" case head cartridges?

 

7 mm Mauser , pretty much every cartridge with a .473 case head .
.30-03 govt , was chambered in several different rifles.
.44 Russian , even though its a revolver cartridge the inside lubricated bullet was a game changer .
not exactly obsolete , but the .375 H&H begat quite a family.

 

Actually, the Gew 88 Commission designed 8mm Mauser is the head of the family. Mauser adapted it to 7mm.

 

Yep , I forgot about the patron 88 , the original .318 bore is definitely obsolete and the great grandfather of about everything from 7mm Mauser to .277 fury

 

The 300 Winchester Magnum is "sort of" the offspring of the 308 Norma Magnum in the fact that, as it says in my Cartridges of the World book, "The 308 Norma Magnum, introduced in 1960, is nearly identical to the 338 Winchester Magnum necked down. If that chambering had not been offered before Winchester was ready to produce its own 30-caliber Magnum, it is possible the company would simply have necked the 338 to 30-caliber."
In my opinion, the only reason Winchester came out with the 300 Winchester Magnum in 1963 was because they were too prideful to chamber their famous Model 70s for a 30-caliber Magnum that had already been invented by another company.
It doesn't make any difference - the 308 Norma Magnum is still better.

 

More descendants of the 7X57 Mauser: 6mm Remington & 257 Roberts.

 

The 57mm case gets no respect nowadays, even though in a long action you can do the same man bun treatment (high BC/heavy for caliber/fast twist) with that case family as you can with the trendy short action rounds.

 

25-35 and 32 Win, too….

 

450 Bushmaster to 30 Remington AR... Or did I get that backwards?

 

Also the 7mm Rem Mag, 338 Win Mag, and I believe the 458 Mag…..all from the ‘same’ case….

 

And ACKLEY!

 

Don't forget the .264 win mag!

 

10mm >>>> 40sw

36 caliber cap-n-ball>>>> 38rimfire >>>> 38sw >>>> 38 colt and eventually to 38, 357mag, 357 max and depending upon how strict you are there are arguments for .380 and 38 super.

 

Not really.

The T65 cartridge case was heavily modified in the rim, body taper, shoulder taper and length before it even became the FAT1 case. Then the FAT1 case when through 2 further variations (FAT1E1 and FAT1E2*) before coming out as the FAT1E3, which we now know as the .308 Winchester.

________
* Although the FAT1E2 was only a paper case, in that it only existed on paper.

 

6.5 carcano rended up as the 7.62x39 combloc

 

400/375 H&H=>every other belted Magnum ever.

 

the little BB/Cap primer only thingy that led to .22 LR