I'm looking for a new .308 and I'm a bit confused over the barrel lengths available. I see most manfacturers designate a "Tactical" version usally sporting a 20" barrel. However if you get into the "Varmit" versions the barrels are usally 26" long. And finally if you are looking for just a plain jane hunting rifle the barrels are 22"-24".
So I guess my question is; Can you get the same accuracy with a 20" barrel as compared to a 26" barrel? I want to do some longer range shooting in the 300-600 yd range but just don't know which length to go with.
Thanks,
HA
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I'm looking for a new .308 and I'm a bit confused over the barrel lengths available. I see most manfacturers designate a "Tactical" version usally sporting a 20" barrel. However if you get into the "Varmit" versions the barrels are usally 26" long. And finally if you are looking for just a plain jane hunting rifle the barrels are 22"-24".
So I guess my question is; Can you get the same accuracy with a 20" barrel as compared to a 26" barrel? I want to do some longer range shooting in the 300-600 yd range but just don't know which length to go with.
Thanks,
HA
I don't know how much accuracy is effected by barrel length but velocity is certainly effected. I guess that didn't help much did it?
ok, shorter barrels (if all other things are equal) are normaly more accurate, however you need a micrometer to see the difference, the reason long range shooters use the longer pipes is to milk all the velocity they can from they're cartridge shooting heavy for caliber high BC bullets.
My long range magnums have barrels as long as 30" on themhow do they shoot, in the .2's at 100 yards
RR
The .308 can be used with short barrels without a great loss of performance. The caliber really developed as a military replacement for the .30-06 and was designed around relatively short barreled autos (M14, AR-10).
A recent review of the Ruger M77 Compact with a 16 inch barrel revealed exceptional accuracy at about 95% of the performance of a 22 inch test barrel. There is not a deer out there that will recognize the 5% loss. However, that compact little rifle is very handy in the woods.
You have a double edge sword. The longer barrel may not be any more accurate but you'll pick up some velocity which at the distances you describe will be a big deal when you trying to compensate for drop. So it could make you more accurate.
Here is how I see the experiment going if hypothetically you'd conduct one. You have to choose a bullet, a brand of brass, a powder and a primer. Shoot a batch of bullets using the same gun with multiple barrel lengths and choose the one that had the smallest standard deviation for velocity. That would be your most accurate barrel length for given cartridge.
I've heard quick and dirty that one inch equals approximately 50fps.
The end all, go with what you're comfortable with.
Tom
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You're not going to lose much in a .308. It's in cartridges with larger powder capacity that the difference is significant as the barrel shortens. Any type of magnum or WSM is going to experience significant losses. For example a 300WSM has the same bore diameter and uses the same bullets as the 308 but a lot more powder....it's intuitive that a longer barrel will help you burn it better.
Barrel Length has ZERO to do with accuracy !! The only thing is can affect and have an effect on is velocity and that's it......A short stiff barrel in one cartridge may shoot this way or that, it may vibrate correctly or it may be totally off balance.. I watch a guy at the hog matches with a 6.5X284 fairly light weight barrel and I'd say was around 30 inches long, that had so much barrel whip that you could see it with you own eyes, and it went on for 2-3 seconds after the bullet was long gone BUT it would shoot sub two inch groups at 500 yards..go figure!
All (or at less most) ballistics are published from using a 24" barrel.
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Barrel Length vs Accuracy
