Best brass for .223 AI?

[RockAndSage]

Any of you guys with experience handloading .223 AI...what would likely be the best brass for a .223 AI, shooting 77gr TMKs? Primary consideration is velocity, followed by durability, then accuracy.

 

[Ganderzone]

Been looking into this as well, starline 5.56 brass seems to be a popular recommendation.

 

[waspocrew]

I was looking at this a while back when considering the 223 AI. I found this chart showing Lake City had more H2O volume than Lapua (old lot - not sure what production date)... seems you can stuff just a little more powder in there.

Personally, I have a ton of Lake City brass, so I'll probably use that when I punch this chamber out to 223 AI. It shoots very well in my Tikka 223, so I doubt it'll be different in the improved chamber. It's left all over the local shooting range, so easy to replace if I lose one while varminting, etc. If I lose a piece of Lapua, it stings a bit more haha.

 

[vonb]

I use Lake City in my .223AI. No problems.