Oil_Slick said:seafarer1939 said:See the Yanks are starting to introduce a new rifle for close quarters with a 0.68 round.
Saw it on the future weapons programme and it stops everything in it's path.
There has long been speculation re.the 0.556 having not much kinetic energy and it seems a person once shot by the M16 turned around and looked at the chap who shot him not knowing he had been shot!
Another armourer once told me the tumbling bullet was made out to be more than it was,you need a round that will knock someone down.
I don't know why we went for the 0.556,top long range accuracy is not paramount any more,close quarters seems the mode of most engagements nowadays and you need to put a man down not drill a hole through him.
Just my take and probably wrong in a lot but seems the Yanks have decided to have more stopping power,will we follow?I doubt it.
Who has the advantage if an AK47 tears your arm off with a round and a SA80 drills a hole thru you?
Guess I need a combat expert to put some slant on this as apart from being an ex-armourer,I have no experience on combat.
Where to startâ€¦
Firstly you mean 6.8 SPC not .68â€¦ a .68" round would have a recoil that would bust your shoulder.
The 6.8 SPC is only in use by SOCOM IIRC in the States with no further roll out envisiged. It's not the be all and end all. It's terminal ballistics are not too stellar beyond 300m. 6.5mm Grendel is a better all round solution.
5.56 lacks kinetic energy? Stand 600m away and tell someone with a 5.56 rifle that. You'll end up with a terminally bad headache.
There is no such thing as 'knock down' power. You kill a target by hitting something critical, brain, heart, spine.
'Knock down power' only exists in Hollywood movies. If a 7.62mm round had enough kinetic energy to knock a target off it's feet, it would do the same to the guy shooting it. Newtons Laws are immutable.
7.62 will go through you just as readily as a 5.56. If you're hit by a 5.56 you will be very well aware of that fact.
No need for long range accuracy? Tell that to the people fighting in the sandy places.
An AK47 round does not 'tear your arm off' and it is a very poor round for accuracy.
The 5.56 does lack kinetic energy. Fact is you cannot get a 22 calibre round to do what a 30 calibre round does. 600 mtrs? one assumes that the target will be hit.
Knock down power does exist, but is very hard to quantify, it means that the round does not kill but puts the person out of the fight at least for a short time.
Both rounds will go through a human body, but the 30 calibre leaves a more lasting impression.