25-06,30-06,270,338-06 35 Whalen
260,243,308,258 338 federal
6.5/300WSM 270 WSM,7 mm WSM, 300 WSM, 325WSM
264 Win, 7mm Rem Mag,308 Norma, 338 Win 358 Norma 458 Win
Plus a lot of old stuff based on the 30-30 case

Well, let's see:
.17 Hornet, .22 Hornet
.17 Bee, .218 Bee
.219 Zipper, .219 Donaldson Wasp, .219 Ackley Improved Zipper
.223 Remington, 6X47
.220 Swift, .240 Cobra
6mm-.250, 6mm Walker International, .250 Savage
.243 Winchester, 6.5X08, 7X08, .308, .358
6mm Page Super Pooper, 6.5X57, 7X57, 8X57I, 8X57S, 9X57, 9.3X57
.25-'06, .256 Newton, .270 Winchester, .30-'06, .35 Whelen, .35 Brown Improved Whelen, .400 Whelen
6mm Improved Krag, .25 Improved Krag, .30-40 Krag
.264 Winchester Magnum, 7mm Remington Magnum, 7mm Taylor & Robbins Magnum, .30-.338 Magnum, .375-.338 Magnum, .458 Winchester Magnum
.300 H&H Magnum, .375 H&H Magnum, .450 Watts Magnum

30 Rem and 6.8

7.62x39 and the 22/6mm PPC and 6.5 Grendel.

375 H&H and 300 Wby Mag

[QUOTE]Originally posted by Stonecreek:
The .270 and .30-06 have slightly different lengths, and the .280 Rem is both longer and has a longer base-to-shoulder dimension than the '06. Of all of the .30-06 "family", only the .25-06, .30-06, and .35 Whelen (and possibly the .338/06) use identical case lengths and shoulder datum points.
QUOTE]

While the 270 does have a longer case neck and thus case length, it shares the same datum as teh .30-06. In fact, the 30-06 Springfield, 25-06 Remington, 6.5mm-06, 270 Winchester, 8mm-06, 338-06, and 35 Whelen all use the same gage.

I have many rifles that shoot different cartidges based off of a similar parent case. Never had the misfortune of inserting the wrong cartidge into a rifle. Trying to use properly headstamped cases helps, as does only having one type of ammo out at a time. Properly marking/labelling wildcat cartidges helps too.