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Posted: 4/3/2021 10:42:55 AM EDT
[#1]
What are you going to do with the rifle?
Hunting? I'd say go 16" lightweight. Target? 18" heavy. |
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Posted: 4/3/2021 3:07:07 PM EDT
[#2]
Not in the slightest. The 16 with flash hider will be much less concussive and have negligible flash in comparison.
Since 308 struggles for velocity to begin with, I suggest the 18” and flash hider. Compared to some linear comps, the weights may be very close between that and the 16”+LC. If you’re going to suppress it later, watch for barrel length restrictions, but I’d probably want the 16” in that case for the handling. |
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Posted: 4/3/2021 3:12:54 PM EDT
[#3]
14-16” is good for 308. If you need better external ballistics I would get a 6.5 anyway.
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Posted: 4/5/2021 9:21:15 AM EDT
[#4]
As said before, 16 is G2G but 18 will give you complete powder burn and less blast. There is no real advantage in velocity going 18, I would decide what you value the most. Compactness or less blast? If you are not going to be running a can I would go 18 but that's me. BTW I have both and use them in different applications....
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Posted: 4/5/2021 10:36:05 AM EDT
[#5]
A longer barrel will allow a more thorough powder burn in a .308.
Your choice in a "hider or comp" will make a difference in how effective it will be. It is hard to find a "jack of all trades" when it comes to muzzle devices. ( If it was easy, we would all be using that one ) I have chosen to go with flash hiding as the most important factor in .308 / 6.5CM, followed by limiting muzzle rise. The Surefire 3 prong Top vented Warcomp has become my goto device for 18" and under .308 / 6.5CM barrels. Sadly, they have become pretty hard to find in stock now a days. So for me, it would come down to which barrel length you would prefer, then use a respected muzzle device. |
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Posted: 4/5/2021 11:13:03 AM EDT
[#6]
I went with 16. Then changed to 18. I am happy with the 18.
I had a can adapter for an HVT on both. No reason not to. This also changed the gas system length, which should probably be more of what you are considering than barrel length. My 16 was over gassed and blew primers, and caused all of the symptoms of what you would think were over pressure. 
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Posted: 4/5/2021 12:16:32 PM EDT
[#7]
Quote HistoryQuoted: I went with 16. Then changed to 18. I am happy with the 18. I had a can adapter for an HVT on both. No reason not to. This also changed the gas system length, which should probably be more of what you are considering than barrel length. My 16 was over gassed and blew primers, and caused all of the symptoms of what you would think were over pressure. https://i.imgur.com/lpVeodq.jpg How does the gas system cause primers to pop? |
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Posted: 4/5/2021 12:33:11 PM EDT
[#8]
Opening too early.
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