308 to 300blk out comparisons

[jcoosi]

Since rifle season opens up next weekend I checked the rifles I will hunt with this season. One is a FNH FNAR in 308 shooting Hornady 150gr sst factory load and the other is a Remmy 700 in 300blk using 125gr nosler. Top 2 holes are from the 308 and center bottom is from the remmy 300blk. Both rifles were shot from 100 yards

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Edited November 19, 2013 by jcoosi

[Guest Bonedaddy]

I've been wantin' to build a 300BLK AR and from the looks of those holes, I should be well pleased with it. I rarely shoot at anything past 250 anyway so it should serve just fine for deer or whatnot. Cool comparison.

[runco]

Those are some cool shots, I mean some really cool shots, the Freon can!  :rofl:

[Guest Bonedaddy]

Ha! But it was made in China so it was probably hotter than ya think.

[Fourtyfive]

Is the 300BLK bigger only because it got smashed out at the weld of the can ? I would assume the .308 to be a much harder hitting round than the .300BLK. Edited November 19, 2013 by Threeeighty

[jcoosi]

Not sure but I will retest and see if it makes a difference.

[Guest Bonedaddy]

Please do. I would like to see that, 'specially if ya could do a 100yd and 200yd comparison.

[nightrunner]

I would assume the .308 is moving at a higher velocity and therefore punched through quicker leaving a closer to original diametet hole, whereas the .300blk was moving at a slower velocity and mushroomed a bit as it entered creating a bigger hole. Of course, not using the same bullet on each would change the results also.

[jcoosi]

I would assume the .308 is moving at a higher velocity and therefore punched through quicker leaving a closer to original diametet hole, whereas the .300blk was moving at a slower velocity and mushroomed a bit as it entered creating a bigger hole. Of course, not using the same bullet on each would change the results also.

 

That's kind of what I assumed also. I may load a few 125 also and run them through the FNAR and compare that way.

[Smith]

300BLK is essentially a slightly underpowered 7.62x39 ballistically.  Quite a bit of difference from a .308 at range. Pretty even at 100 yrds.

[Fourtyfive]

A very large power differential , the larger hole has to be the difference in the bullet or from what it hit.

As I understand these are the differences :

.308
Test Barrel (24") Velocity (fps) / Energy (ft-lbs)
MUZZLE 100 200 300 400 500
2820/2648 2601/2252 2392/1905 2192/1601 2003/1336 1823/1107

Caliber: .300 AAC Blackout
Grain: 125
Type: Ballistic Tip
Bullet Manufacturer: Nosler
Velocity: 2170 fps.
Energy: 1,343 Ft. lbs.


Barrel length of course as well as gas length on an AR will make differences , I don't know the barrel length on the .300 statistics.

[Fourtyfive]

For the fun of it , how about some back side pics ?

[jcoosi]

For the fun of it , how about some back side pics ?

 

 

 

I will have to set up another one it got molested with the ksg afterwards