You have one shot to save your life at 100yds

[Pinnacle Safety]

What caliber do you use .308 or 7.62x39

[B2Tall]

.308

It hits harder and the rifle firing it is probably more accurate than one firing a X39.

[festus]

.308 Win 180 Gr Boattail hollowpoint matchking

[walther380]

Either my 17HMR or my 30.06 because thats what I own.

[wallyb]

I would have to use my AK47 and fire a burst, because I don't have a .308.

[Firefighterchen]

I would use the rail gun from transformers 2....

But since you gave two specific rounds that people are ignoring .308 would be my choice

[Live_Free_orDie]

.223 from my RockRiver w/EOTech for 100yds. My Sako TRG-22 .308 w/ LR/T 6.5-25x50 TMR is for further out! Remington 887 12Ga. for closer...and Glock 21 for even closer.

[walther380]

How do you like that 6.5?

[imrambi]

My savage .30-06, then some 12Ga slugs, then buckshot and then the G19, then G26. (In order of farthest to shortest distance if I had all firearms handy)

The .30-06 I know I can hit, 12 Ga would have to aim high, the pistols would be a different story.

[trailboss]

50bmg
308
But of what I have 45colt