Whats the best grain bullet?

[butcher98951]

Looking for some opions on what the best grain bullet is for a Bustmaster 223 AR, for a range of around 300 yards?

[thinkingman]

What is the twist rate of the barrel?

[timberghost72]

Barrel length and rate of twist will help get an accurate answer

[Straight Shooter]

They're typically 1:9 like my DPMS ARs.  My ARs will pretty much shoot anything 68 grs or less with great accuracy.  Right now, I'm shooting more 40 gr and 50 gr V-Max loads than anything else.  When you're talking about "best" grain bullet, are you talking about long-range bullet-drop, wind drift, energy, etc.?   

[butcher98951]

Sorrry i forgot that it is 1/9 twist with 20 inch barrel..

[butcher98951]

They're typically 1:9 like my DPMS ARs.  My ARs will pretty much shoot anything 68 grs or less with great accuracy.  Right now, I'm shooting more 40 gr and 50 gr V-Max loads than anything else.  When you're talking about "best" grain bullet, are you talking about long-range bullet-drop, wind drift, energy, etc.?   

Yes kinda looking for a good grain bullet to zero in at 300 yards, how high at 100 plus still having the con. energy at 300 to put it down..

[Straight Shooter]

They're typically 1:9 like my DPMS ARs.  My ARs will pretty much shoot anything 68 grs or less with great accuracy.  Right now, I'm shooting more 40 gr and 50 gr V-Max loads than anything else.  When you're talking about "best" grain bullet, are you talking about long-range bullet-drop, wind drift, energy, etc.?   

Yes kinda looking for a good grain bullet to zero in at 300 yards, how high at 100 plus still having the con. energy at 300 to put it down..

This should help...

http://www.rifleshootermag.com/ballistics/223_remington.html

[butcher98951]

Thanks Straight Shooter now i just have to figure out how to read it....lol

[GEARHEAD]

53-55

[thinkingman]

I'd be at 68-69 grains...Sierra MatchKings or Hornady