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GarrettMoore
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Posted: 1/27/2012 7:24:44 PM
[Last Edit: 1/29/2012 6:09:16 PM by GarrettMoore]
Will a bullet fired from a 16 inch barrel have a flatter trajectory than one fired from an 11.5 inch barrel?
2minkey
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Posted: 1/27/2012 3:15:08 PM
you might want t read the FAQ/sticky posts in the ammo forum. lots of info there.
sinlessorrow
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Posted: 1/27/2012 6:01:13 PM
I would read the ammofaq.

That sai you want as much velocity as you can get, luckily now days we have very good bullets in 5.56 that work very well out to 200yrds even with sbr's
Cyclic
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Posted: 1/27/2012 10:16:01 PM
Here's my stats for my 11.5 using walmart green box remington 55 gr ammo.

Muzzle: 2700
100 yards: 2370
200 yards: 2075
300 yards:1800
400 yards: 1560
500 yards: 1350

I would rather never be hit by a 55 gr bullet going 1350, I'll bet your thinking the same.
baldbull
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Posted: 1/28/2012 1:38:40 PM
BCM did a good write up on why they build 11.5" uppers.
KYtechmike
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Posted: 1/28/2012 2:34:11 PM
Originally Posted By baldbull:
BCM did a good write up on why they build 11.5" uppers.


Would you happen to have a link to that?

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Posted: 1/28/2012 2:43:43 PM
Originally Posted By KYtechmike:
Originally Posted By baldbull:
BCM did a good write up on why they build 11.5" uppers.


Would you happen to have a link to that?



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GarrettMoore
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Posted: 1/29/2012 1:39:48 PM
[Last Edit: 1/29/2012 6:14:25 PM by GarrettMoore]
I edited my original post to better state my question. But to expand a little, my rifle has an 11.5 inch barrel and a permanent 5.5 inch flash hider. I bought the rifle before I had a clue as to what I was doing. Now, I use the gun for three-gun competitions and think it's a waste to have 5.5 inches of flash hider when I could have 5.5 more inches of barrel. So I'm thinking of swapping out a new 16" barrel. But if the 11.5 inch barrel has a negligible effect on bullet trajectory / accuracy / whatever, then I may use the money elsewhere.
eightring
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Posted: 1/29/2012 9:50:30 PM
viperashes
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Posted: 1/30/2012 11:17:10 AM

Originally Posted By eightring:
ballistics by the inch

That's what she said?
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GarrettMoore
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Posted: 1/30/2012 3:34:44 PM
Originally Posted By eightring:
ballistics by the inch


Thank you very much.

So based on that chart, I would only see about a 15% increase in velocity. That's probably not worth the cost of a new barrel and gunsmithing. Am I right?
9mmprn
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Posted: 1/30/2012 10:23:07 PM
There is a supposed benefit of increased reliability, less wear and less likelihood of baffle strikes when suppressed. Personally if you are not having issues with any of the above I wouldn't bother moving up.