Originally Posted by unclebear
the AK74 actually has more range then the AK47 because the round is smaller lighter and travels faster. When it impacts a human torso it startes to tumble causing more damage. Really it's the russians answer to our 5.56 and on full auto it's more controllable then the aK47. When it comes to penetration the AK47 will go straight through a cinder block wall where the AK74 might or might not depending on the situation.
Personally I prefer the 7.62x39 ammo is cheap easy to find and knocks the living hell out of what ever it hits.
Yes the AK74 round does tumble when it hits a soft target that is why it is called the poison bullet. The 7N6 steel core 5.45x39 will also punch through 1/2 steel at 100yds. I found this out by shooting a the 100yd gong at the range not knowing my scope was off. I was seeing the sparks coming off of the leg but I was thinking it was just bouncing off the gong until I went down range to look at a paper target. There wasn't any holes in my paper but when I looked at the gong I could see all the fresh hits were holes through the leg.
So I don't know about cinder blocks but steel is no problem.