MP, if you compare ballistics of the 223 and 90gr VLD vs the 6BR and 105gr VLD -guess what? The 223 WINS !!!
It's all about the bullets. Velocity with either is very similar but the 90gr Berger VLD has a higher BC then ANY Berger 6mm VLD bullet.
Surprised? I know I was.
HD, if you start with the 223 and go with a 7 twist and 90gr Berger VLD, you will be in excellent company for a very long time. When are you ready to look at something with better ballistics, you will enter the realm of the 6.5, 7mm and 338's
But these will all cost more, kick more.
All we need is a new high energy powder for the 223 and there will not be a 308 in F TR.
Jerry
I dunno about this one man. I don't mean to call you out on this but I think you are mistaken.
223 with 90g bullet has a max muzzle velocity of 2447, lets say 2500 for a hot load
6mmBR with 105g Berger VLD get around 2900, so lets say 2800 for fun.
0.551 for the 90gr Match 22cal VLD
0.493 (sux now, used to be 0.556) Lets remember Scenars are still .530!
Numbers from JBM
6mmBR 105g Berger Match VLD
Range Drop Drop Windage Windage Velocity
(yd) (in) (MOA) (in) (MOA) (ft/s)
0 -1.5 *** 0.0 *** 2805.8
100 -0.0 -0.0 0.6 0.6 2634.9
200 -3.5 -1.7 2.5 1.2 2469.7
300 -12. -4.1 5.8 1.8 2310.4
400 -28.5 -6.8 10.6 2.5 2157.4
500 -51.7 -9.9 17.1 3.3 2010.4
600 -83.5 -13.3 25.6 4.1 1868.9
700 -125.3 -17.1 36.1 4.9 1732.3
800 -178.8 -21.3 49.0 5.8 1600.1
900 -245.8 -26.1 64.6 6.9 1472.4
1000-328.9 -31.4 83.2 7.9 1349.7
223 Match VLD
Range Drop Drop Windage Windage Velocity
(yd) (in) (MOA) (in) (MOA) (ft/s)
0 -1.5 *** 0.0 *** 2505.3
100 -0.0 -0.0 0.7 0.7 2349.7
200 -4.8 -2.3 2.8 1.4 2200.0
300 -16.8 -5.3 6.6 2.1 2056.0
400 -37.0 -8.8 12.1 2.9 1917.4
500 -66.7 -12.7 19.6 3.7 1783.4
600 -107.4 -17.1 29.3 4.7 1653.8
700 -160.8 -21.9 41.4 5.6 1528.3
800 -229.1 -27.3 56.3 6.7 1407.2
900 -315.0 -33.4 74.4 7.9 1291.2
1000 -421.9 -40.3 96.1 9.2 1181.3
That sir is a HUGE frikken difference. I realize these charts are not 100% accurate but the numbers are complete opposites. And this is assuming you have a light 6mmBR load and a heavy 223 load. That and everybody that shoots a 6mmBR knows how accurate the cartridge at 600-1000 yards. I can't see any 223 being that great.
One also has to remember that the 90gr Bergers are an extremely long bullet and a lot of barrels refuse to stabilize the 90s or even the 80s. I couldn't stabilize the 80s in a 1-8 twist 30in barrel to save my life. Others have done it in a 1-9 so it seems a bit finicky once you go that heavy.
All this typing just to justify my stance on the 6mmBR.