Okay, everybody, hands in the air. This thread is being HIJACKED
On first glance, you might think that the European method would make more sense, but it can be just as confusing.
Take 7x57. 7mm bullet in a case 57mm long. Simple. We know it as the 7mm Mauser. They also have a 7x57R. Same round, except it is in a rimmed case, instead of rimless. Used, mostly, in single shots and double rifles.
They have the 8x57 and the 8x57R. Once again, the same round, except that one has a rim on it and the other doesn't.
So, how about the 7.62x51 and the 7.62x51R? Same round, right? Just like the others? Only difference is the rim? WRONG!!
7.62x51 is 308 Winchester. 7.62x51R is 30/30 Winchester. Those two rounds aren't even close. Not in power. Not in usage. Not in bullet types used. Nothing. Except for one thing. Length.
In this country we have the 380, also known as the 380 ACP. Nice little round, used in pocket pistols. In Europe they call it the 9x17mm. Except where they call it the 9mm Kurz. Or the 9mm Corto. Or the 9-34. Or the 9mm Browning. Or the 9mm Browning Short. All the same thing. Them-there Europeans is just as confuddled as we'uns.
Meddle not in the affairs of dragons, for thou art crunchy, and taste good with catsup - George of Lod, Year of Our Lord 297
I always take precautions.
Beware the Evil Bullet Fairies.