No, regardless of the actual size of the round, you can't have a universal cartridge. Reality has proven it a pipe dream.
Caseless ammo development has been going on for 75 years, and we are no closer to having caseless ammo than we were then. So when we have caseless ammo, let's talk about it then. As of now, it's a non-starter.When caseless or telescopic cased ammo becomes viable,
Sure. (yawn)Remember 6mm SAW?
Sure. (yawn)
Lackluster then, who cares anymore? 100 gr at 2,500 fps. Woo hoo! I have a 30-30 that can outdo that
Caseless ammo development has been going on for 75 years, and we are no closer to having caseless ammo than we were then. So when we have caseless ammo, let's talk about it then. As of now, it's a non-starter
Some countries that used such smaller bore cartridges still used a larger bore cartridge for their heavy machine guns (now referred to as medium machine guns). I guess they were trying to cover all the bases.
Are all of these newer cartridges going to fare any better if there is an attempt to use them for everything?
Universal? Please state the degree to which it will replace things.
Universal? No, it cannot be done.
Everything the 308 can do the 223 can do. Even as a designated marksmen rifle or a general purpose machine gun.
If you cant have a cartridge as powerful as a 30-06 or a 54r what is the use in having a full power rifle cartridge?
they already have a universal cartridge in the 223. with the new m855a1 it can penetrate cinder block better than a 308 fmj. small bullets yaw quicker in muscle and organs better than big bullets, of which the average human is pretty enemic as far as big game goes.
During the 1970s, NATO members signed an agreement to select a second, smaller caliber cartridge to replace the 7.62 mm NATO. Of the cartridges tendered, the 5.56 mm was successful, but not the 5.56 mm loading (3.56 g (55 gr), M193 Ball) as used by the U.S. at that time. The wounds produce by the M193 round were so devastating that the International Committee of the Red Cross (ICRC)[5] and many countries (Austria, Argentina, Belgium, Bolivia, Bulgaria, Burundi, Cambodia, Cyprus, Germany, Ireland, Latvia, Lithuania, Luxembourg, Mauritius, Mexico, Romania, Samoa, Slovenia, Sweden, Switzerland, etc.)[6] considered the 5.56x45mm cartridge to be inhumane.[7][8]
Instead, the Belgian FN SS109 loading was chosen for standardization. The SS109 used a 4 g heavier (62 gr) bullet with a steel core inserted, fired at a lower muzzle velocity for better long-range performance, specifically to meet a requirement that the bullet be able to penetrate through one side of a steel helmet at 600 m. Some believe that this requirement has made the M855 less capable of fragmentation than the M193 as discussed below.[9]
Look what the Full Metal Jacket requirement has made happen - instead of dumping the bullets energy into the human structure and damaging it enough to stop further action, it passes thru - meaning they have to be shot again, and maybe another time, to get them to cease participating. That's happened time and again regardless of caliber.