PDA

View Full Version : .308 Upper in 24", 18" or 16"?


Davis
02-13-2007, 6:05 PM
Now that I have the bug and have an OLL .308 coming in

I will need an upper to complete the journey to the dark side.
I like the idea of the DPMS Panther 24" barrel but it makes it a long & heavy gun.
I have 2 teenagers and a wife and they used to love shooting my CAR-15 vs the AR15 I had due to length/weight
I really want to work on shooting around the 300 yd arena or more but I want to keep the family included
Can someone or everyone enlighten me on the negatives and positives of getting a 16 or 18 barrel vs the 24"

Thanks
Scott

C.G.
02-13-2007, 6:31 PM
How far do you want to shoot?

24" is benchrest and will get you to 1000 yrds.

18" should get you out to about 800 yards

16" personally I think is better on 5.56.

Optimal length to 1000 yards is 21" or 22" depending which barrel maker you talk to.

I have an Armalite chrome-lined 20" on mine and like it a lot.

rorschach
02-13-2007, 6:47 PM
I think a 16" barrel defeats the whole purpose of an AR in 7.62X51

DIG
02-13-2007, 6:52 PM
Now that I have the bug and have an OLL .308 coming in

I will need an upper to complete the journey to the dark side.
I like the idea of the DPMS Panther 24" barrel but it makes it a long & heavy gun.
I have 2 teenagers and a wife and they used to love shooting my CAR-15 vs the AR15 I had due to length/weight
I really want to work on shooting around the 300 yd arena or more but I want to keep the family included
Can someone or everyone enlighten me on the negatives and positives of getting a 16 or 18 barrel vs the 24"

Thanks
Scott

From the info you gave above, 18" would be it.

Fjold
02-13-2007, 7:05 PM
The Palma shooters (308 only at 1,000) use 30" barrels not 21"-22". A 308 at 1,000 yards needs the extra velocity that the longer barrel gets them. The difference in velocity from a 24" barrel to an 18" is probably at least 350-400 fps which will cost you dearly past 600 yards. The 18" barrel will get you out to 600 yards and the 16" barrel will get you alot of muzzle blast.

Sniper3142
02-13-2007, 7:28 PM
The Palma shooters (308 only at 1,000) use 30" barrels not 21"-22". A 308 at 1,000 yards needs the extra velocity that the longer barrel gets them. The difference in velocity from a 24" barrel to an 18" is probably at least 350-400 fps which will cost you dearly past 600 yards. The 18" barrel will get you out to 600 yards and the 16" barrel will get you alot of muzzle blast.

Lots of shooters use 20 to 26 inch barrels out to 1000 yards just fine.

A 175gr SMK will get there just fine.

cornholio1
02-13-2007, 11:43 PM
I'd say 16" barrel. The flexability is incredible for carrying during hunting. Its very versatile. The 20" is a bit long for me. Most of the shots taken are under 300 yds anyways. I can't even find a place to shoot 1000yds.

adamsreeftank
02-14-2007, 5:12 AM
18 inches with a mid-length gas system.

Davis
02-14-2007, 6:55 AM
I do have a range that has a standard, 300 yd and 1000 yd rifle range and more options that would be great to work with.

Its starting to look like a 18" Bull barrel fluted would be the ticket.

tiger222
02-14-2007, 7:22 AM
I think the beauty of the AR system is the ability to have multiple uppers ~

I am into "less is more" so i'd to 16" too, but truth be told my next 308 I am considering is a 12.5" (with a 4" fixed flash hider, a G3K clone).

Of all the 308 AR's out there I would shoot for a noveske (?) leonadis (?) clone and paint the whole rifle desert tan.... :)

brando
02-14-2007, 9:04 AM
I think 18-20" is the sweet spot for a general purpose .308. When you get into the 16" or less range, the velocity reduction becomes an issue.

mltrading
02-14-2007, 10:34 AM
For 308s, 20" would be excellent for general purposes.

If you are a hardcore long gunt nut like me, a 24" or even 26" will fit you.:)

Gunsrruss
02-14-2007, 10:39 AM
You need the 24" barrel. You are shooting a much more powerful round. With the shorter barrels bushes, wildlife will be in danger of flash burns and such. You must go with the 24". trust me you will be so much happier with that. The whole gun will be bigger. You won't notice the extra length, but you will need it to get performance from the rifle.

C.G.
02-14-2007, 10:42 AM
For 308s, 20" would be excellent for general purposes.

If you are a hardcore long gunt nut like me, a 24" or even 26" will fit you.:)

+1. :)

mltrading
02-14-2007, 11:44 AM
Forgot to mention, the long range competition shooters even put 4" barrel extension over the muzzle of their barrels to get longer sight radius and better weight balance. It's nothing to do with performance. But it will make your rifle very slender. :)

Vepr62
02-14-2007, 12:31 PM
In my humble opinion 20" is the minimum for .308. I have Rem. 700P LTR with 20" barrel and The velocity about 300fps lower than from my 24" Howa. In my 20" .308 Vepr it's another 100fps less, I would think because of pressure loss after thr bullet passes the gas port.
Vasiliy

Cbieling
02-14-2007, 8:46 PM
I am currently working on some upper deals for you guys. DPMS is good as well a JP.

I would say 18" would be a great mid point for some extra FPS at the barrel without too long of a barrel.

Chris

Hunter
02-14-2007, 10:48 PM
I am currently working on some upper deals for you guys. DPMS is good as well a JP.

I would say 18" would be a great mid point for some extra FPS at the barrel without too long of a barrel.

Chris


What models for the DPMS line are you looking at? Some have shell deflectors, others do not.

five.five-six
02-14-2007, 10:58 PM
noveski says 21" and I tend to believe that

C.G.
02-15-2007, 12:55 AM
noveski says 21" and I tend to believe that

The Holy Grail. Personally, in a semi auto, I am leaning toward 22" (because my FAL is 21").