Bullet Grain and Rifling Twist Question

[Gunfighter420]

Back in my AR newbie days I bought some Hornady 75gr TAP 5.56mm ammo for personal defense rounds. They're hard to find now and really don't want to get rid of them. My AR has a 16" RRA 1:9 twist upper and later I learned 75gr works best in 1:7 twist. IF SHTF will I be ok shooting that heavy bullet in my 1:9 twist?

Not sure if this was the right forum so I apologize if it's not.

Thanks!!!

[Noobert]

How much 75gr do you have?

[Jonathan Doe]

If SHTF, anything that will fire in your firearm will be good enough. YOur 1-9" barrel will shoot 75 gr bullets.

[Gunfighter420]

How much 75gr do you have?

I have 600 rounds of that stuff. Its the T2 series p/n 8126N.

[Agustav]

I've shot 75gr Hornady bullet out of my 1:9 twist 16" barrel and it works. However, the group was not as tight as lighter bullets.

[PsychGuy274]

The recommended grain range for a 1/9" twist is between 52 and 68 grains. That's for best accuracy.

But in a real SHTF scenario you'll most likely only be engaging targets at combat range in which case it's doesn't matter as long as it goes bang.