Newbie SBR/Ammunition Question

**markm** · 05-19-09, 14:10

Anything out of a barrel that short is going to be pretty useless. I'd just shoot whatever is cheapest and still runs.

Using expensive ammo would be foolish.

**SonicKrack** · 05-19-09, 14:25

Isn't the Noveske Diplomat the King of 7.5" SBRs ? Black Hill ammo test showed accuracy comparable to 16" AR rifles.

**markm** · 05-19-09, 14:29

Originally Posted by SonicKrack

Isn't the Noveske Diplomat the King of 7.5" SBRs ? Black Hill ammo test showed accuracy comparable to 16" AR rifles.

Shooters on this site know that accuracy isn't a function of barrel length.

What good is accuracy if the bullet is traveling too slow to accomplish anything? At that barrel length, a 9mm SBR would be better.

**LOKNLOD** · 05-19-09, 14:46

I think it'd be useful to qualify what the OP means by "...will work best..."
Reliable function? Accuracy? Terminal ballistics?

There's a big difference between "what wont short stroke my SBR" and "what will be most effective against intermediate barriers out of my SBR".

**SonicKrack** · 05-19-09, 14:47

Well,

If I was an intruder and saw one of those in the Home owner's hands... wouldn't think twice about running as fast as hell. It seems that most Diplomat owners are very happy with their investment thus the unavailability for purchase. I would drop $2500 for one without questions in this moment.

As you can see I am not a specialist or too knowledgeable when it comes to SBRs but I would love to have one of them

**OPPFOR** · 05-19-09, 14:52

Originally Posted by markm

Shooters on this site know that accuracy isn't a function of barrel length.

What good is accuracy if the bullet is traveling too slow to accomplish anything? At that barrel length, a 9mm SBR would be better.

How much velocity is lost when firing .556 from 7.5" barrel opposed to a 14.5" or 16" carbine? I know this will differ with ammo brand and quality. Just looking for some kind of average comparison.

**SonicKrack** · 05-19-09, 15:01

I might be wrong, but wasn't the SBR designed for close combat ? Velocity lost in a 7.5" barrel within 25 yards will do the job just fine and rip off Ali Mujahadin's head, no doubt... Personally I would love a Diplomat because it's pure sex

**Zhurdan** · 05-19-09, 15:01

Isn't it like 30-40fps per inch? (think I remember that in the deep recesses of my brain)

7.5" vs. 14.5" = -7" * 40fps = 280fps loss

I'm not sure I'd consider that too much velocity loss (if it's correct) being that the rifle would be mainly used for up close and personal stuff anyways, right?