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Discussion Starter · #1 ·
does anyone know where i could find specs and info on both cartridge's showing the pro's and con's of both cartridge's?

my dad is looking to pickup his AR soon and dosent know which caliber to go with...he thinks "bigger is better"...but ive been trying to tell him that for recreation and hom defense the .223 would be ideal in my opinion...plus its cheaper to shoot.

he thinks "it has no stopping power" and "its the 9mm of rifle caliber's"

i told him to get whichever caliber he wants...but he wants to see somthing comparing the .223 and the .308 showing the pro's and con's of each.

anyone know where i can get such info? a google search didnt help me much.
 
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Discussion Starter · #3 ·
If you try looking for the 6.8SPC, you will see a lot of comparisons since they are comparing to .223 and .308.

Depending on what his use is, I would steer him towards a 6.8 or 6.5 Grendel. There is a host of information out there, and in the case of the 6.5G, the performance is very very close to .308, and can surpass it in areas. The nice thing about either one of these is he can have the 5.56 rifle, and then slap the other upper on it, change mags, and off you go. With the .308, you are talking about a dedicated rifle.

Here is something anyway...
[SIZE=-1]>> Reference Ballistics, Light & Fast 5.56mm
_BC_ _MV_ 0 100 200 300 400 500 600 700 800 | YARDS
0.324 3100 > -2.55 0.00 -1.85 -9.24 -23.35 -46.26 -79.78 -127.75 -193.01 | > IMI M855 62gr
-0.00 1.00 3.00 5.50 8.75 12.75 17.50 23.00 Qt.MOA
3097 2802 2525 2262 2019 1790 1582 1397 1242 | fps, velocity

0.260 3215 > -2.55 0.00 -1.75 -9.20 -23.98 -48.96 -87.15 -144.30 -225.10 | > SA M193 55gr
-0.00 0.75 3.00 5.75 9.25 13.75 19.75 26.75 Qt.MOA
3211 2838 2492 2170 1878 1608 1379 1195 1066 | fps, velocity

>> Reference Ballistics, Heavy & Slow 223/308
0.395 2670 > -2.54 -0.00 -3.24 -13.54 -32.14 -61.26 -102.56 -159.81 -235.18 | > 223REM Black Hills 75gr 20", chrono'd
0.00 1.50 4.25 7.75 11.75 16.25 21.75 28.00 Qt.MOA
2667 2446 2235 2034 1846 1667 1506 1360 1237 | fps, velocity

0.447 2575 > -2.54 -0.00 -3.56 -14.43 -33.69 -63.38 -104.82 -161.35 -234.58 | > 308WIN FGMM 168gr from AR10 20", chrono'd
0.00 1.75 4.50 8.00 12.00 16.75 22.00 28.00 Qt.MOA
2573 2381 2197 2021 1855 1696 1550 1416 1298 | fps, velocity

>> 6.8SPC Ballistics
0.370 2660 > -2.54 -0.00 -3.36 -14.03 -33.39 -63.96 -107.72 -168.94 -250.23 | > 6.8SPC 110gr VMAX 18", chrono'd
0.00 1.50 4.50 8.00 12.25 17.25 23.00 29.75 Qt.MOA
2657 2422 2199 1987 1789 1603 1439 1293 1176 | fps, velocity[/SIZE]
 
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Discussion Starter · #5 ·
i showed him what info i found on google, and showed him some tests on youtube..he wants low recoil, with good capacity and good penetration so he thinks .223 will be best for him...i agree.

i told him that he can always get a .308 rifle later on...but he would rather skip .308 now and go to .30-06 M1903

he is like trying to help a woman make a decision.
 
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