9:1 .223 what bullets to shoot?

[bandit86]

I personally like the heavy bullets, never had a .223 till this week. What's the lightest / heaviest rounds meant to be shot?

 

[caramel]

1 in 9 in my MR-1 and my pet load is with 77 gr Lapua Scenar, this twist is the overall best... JP.

 

[.30/06 FTW]

I personally like the heavy bullets, never had a .223 till this week. What's the lightest / heaviest rounds meant to be shot?

What gun are you planning on shooting them in? Remingtons are not great with bullets over 70 grains.

 

[Ganderite]

I did some testing for Savage and found the longest bullet it could handle was the Sierra 80 MK. It had to be loaded full power to stabilize.

The 77 or 75 hr HPBT is a safe bet.

 

[bandit86]

Remington 700 sps, what is needed to fire 90 grain bullets?

 

[hometownhero]

For factory ammo my 223 (1:9 twist also) really shines with hornady 53gr superformance

 

[Ganderite]

If your Rem is 1:9, it wont stabilize a 90g bullet.

 

[hometownhero]

Remington 700 sps, what is needed to fire 90 grain bullets?

1:7 twist is needed

 

[Melnibonean]

Remington 700 sps, what is needed to fire 90 grain bullets?

1-in-12" - 35gr up to 55-60gr
1-in-9" - 45gr-75gr, possibly up to 77 if you're lucky
1-in-8" - 45gr - 80+gr
1-in-7" - 55gr - 90gr

Some people's 1/9 can't stabilize 75gr bullets, while others can get away with 77gr bullets in theirs. Technically, it isn't about the WEIGHT, but the LENGTH of the bullet, as well as air density and velocity. A simplified method for determining the minimum rifling twist rate for a given length of bullet is given by the Greenhill formula. A Google search will show many sources for those interested in a more in-depth discussion, or you can just click here:


http://www.stevespages.com/page8e.htm

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