I am a bit of a noob, and have been hanging around for a while, and feel like I'm starting to figure things out. Still, there's one thing I haven't really seen a real explanation about: what is the difference between available calibers? I know .223/5.56 is the standard round (with 5.56 being a higher-pressure loading), but what are the strengths and weaknesses of other available options in the AR frame, such as 7.62x39, 6.5 Grendel, 6mm PPC, 6.8 SPC, or even more exotic/involved (.308 requires a different lower due to length?)
I'm not trying to get a 'best' cartridge, because I know that depends on application, and I don't really have one in mind yet (I'm just curious). I'm just trying to get a feel for whats out there, and an honest comparison, as most stuff I read seems to say that their chosen round is the 'best'. Is there a comparison somewhere that I haven't found?
Thanks!
I'm not trying to get a 'best' cartridge, because I know that depends on application, and I don't really have one in mind yet (I'm just curious). I'm just trying to get a feel for whats out there, and an honest comparison, as most stuff I read seems to say that their chosen round is the 'best'. Is there a comparison somewhere that I haven't found?
Thanks!