Building or buying a 762 AR in 14.5 or 16"???

[smullen]

Building or buying a 762 AR in 14.5 or 16"???


So I'm wanting an AR in 762 this year or early next...

I can't decide on 14.5 or 16"?


This will be mostly for target shooting paper and steel @ 200-300 yards... That is longest shot at my current range, but I'm hoping to find or buy some land to get out to maybe 600...


Do I really lose much velocity or anything with the slightly shorter barrel?

[wahoo95]

I've always been u der the impression that most folks don't like to go under 16" for .308.

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[MistWolf]

By the time you go 16" or less with a 7.62x51, it's velocity drops to being close to what you'd get with a 300 BLK or 7.62x39. My experience has been that the 7.62x51 has ferocious muzzle blast with barrels 16" or less.

I haven't run it over a chrono, but I'm very satisfied with the performance of my Para FAL with an 18" barrel & BABC

[TehLlama]

Unless you're going to run it suppressed full time, 16" would be my advice too. Still really loud anywhere enclosed, but that's pretty much the break even point, any shorter than those and a BLK setup is giving you comparable muzzle energy in the same size package, with much cheaper rounds.

[DocGKR]

If not primarily suppressed, I strongly prefer the 16".

[fallenromeo]

Smullen,
Are you talking 7.62x51 (.308) or are you talking 7.62x39 or 7.62x35 (300BLK) or 7.62x40 Wilson or ...???

[smullen]

Smullen,
Are you talking 7.62x51 (.308) or are you talking 7.62x39 or 7.62x35 (300BLK) or 7.62x40 Wilson or ...???

7.62x51 (.308)

I'm leaning towards the 16"...

I would like to suppress it in the future as funds become available.

If I do, I'd love to be able to swap the can between this and my Remington 700 SPSV in .308... Not a must, but would be nice...

[kenndapp]

i have been kicking around the idea of a 14.5 .308 as well. with appropriate ammo you still have a pretty effective shortish riffle, no? a 155gr amax expands down to something like 1650fps. you cant squeeze 2500fps -2600 out of a 14.5" barrel with 155gr pills and lighter? 2500fps to 1650fps seems like a pretty generous amount of velocity to work with right?


check this out, POF is getting 2428fps out of 14.5" barrels with 168gr pills.
http://www.pof-usa.net/technical/chronoresults.htm

with a lighter projectile (150 accubond, 155gr amax, barnes 130gr sbr, any tsx or ttsx under 165gr, and also the 130 gr mk319) you could have a short .308 that behaves more like a .308 and less like a 300blk. am i off base here?