|Originally Posted By Forest:
Originally Posted By justbill:
I'm quite confident in the ability of .223 rounds like Federal Tactical Bonded, TAP Barrier, etc. to penetrate reasonable cover, expand and still provide a serious wound.
Hmm a .223 55gr expanding round traveling at 2705 fps or a .277 110gr expanding round traveling at 2650...
I'll take the advice of the researcher who's tested both (docGKR):
Remember the 6.8 x 43 mm SPC offers dramatically superior terminal performance compared to ALL existing 5.56 mm loads. Where 5.56 mm carbines may offer an advantage is when limited penetration through common intermediate barriers is desirable, for example, LE personnel performing entry in crowded urban environments. For those LE personnel who will need to punch through intermediate barriers or into vehicles, the 6.8 mm offers both superior penetration and incapacitation ability compared to 5.56 mm. Finally, keep in mind that 6.8 mm is more versatile and effective in short barreled carbines, as it does not suffer as much terminal performance decrement as 5.56 mm fired from short barrels.
It seems like you're starting to read into stuff that isn't there. At no point did I say the .223/5.56 gave better terminal performance than comparable 6.8 loads. What I did say is that in my opinion, the 6.8's increase isn't worth the added cost for many people. I also don't like the limited choices in magazine selection, handloading components and factory ammo. If your shooting budget allows you to switch over, great for you. If you're satisfied with 6.8 bullet selection and mag availability, again, thumbs up. For me, I'm quite satisfied with the .223/5.56's performance when loaded with expanding bullets. From the looks of things among law enforcement and the military, I'm not alone. IMO the 6.8 SPC, while an interesting development, is headed to the land of the .358 Winchester and .41 Magnum - cartridges enthusiastically supported by their adherents for valid reasons but just not good enough for the vast majority of consumers to switch from other choices.