Yimmy:
There are a couple of reasons why new rounds are more powerfull than older ones. (This is just what I think, I could be wrong). But older rifles had barrels that were not as tough as today. And, I believe, that different powder has been made for hotter rounds (the .223 WSSM comes to mind, you could've of seen that kind of rifle 50 years ago, the barrels would die so fast, a 40 grain bullet going at 4,500 fps is fast).
It has just been a combination of older rifles with there barrels and powder being advanced. A good example of this would be the 6.5X55 Swede, manufactures keep the round mild because of old rifles. In contrast a .260 is hotter round but still smaller.
I hope I've made a little bit of sense with this post.
There are a couple of reasons why new rounds are more powerfull than older ones. (This is just what I think, I could be wrong). But older rifles had barrels that were not as tough as today. And, I believe, that different powder has been made for hotter rounds (the .223 WSSM comes to mind, you could've of seen that kind of rifle 50 years ago, the barrels would die so fast, a 40 grain bullet going at 4,500 fps is fast).
It has just been a combination of older rifles with there barrels and powder being advanced. A good example of this would be the 6.5X55 Swede, manufactures keep the round mild because of old rifles. In contrast a .260 is hotter round but still smaller.
I hope I've made a little bit of sense with this post.
