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Posted: 1/21/2017 8:43:29 PM EDT
| Does it really makes a difference on having a short or mid gas tube on either a 14.5/16" barrel? |
| gas tube length is determined by where the gas port is drilled on the barrel ie: pistol/carbine/midlength/rifle and I believe there is an intermediate length now? haven't seen much about that one, but you need to know what your barrel is drilled for and buy the same length gas tube....... |
| Sounds like he means carbine or midlength gas on a bbl make a difference? I would say very slightly providing it is from a reputable manufacturer. Midlength gas does offer slight advantages by increasing the dwell time to slow the action but recoil seems the same to me. |
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As you move the gas port further from the chamber, the gas return impulse softens.
In terms of actual performance, probably not, apart from the impulse. I've met a lot of guys that insist that a carbine length system will cycle more reliably when things get really dirty, because the cycle is more abrupt. I'm not really buying into that train of thought yet, although it may have some merit. I've stayed with mid-length as much as possible, as it simplifies my part selection. |
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Quoted:
As you move the gas port further from the chamber, the gas return impulse softens. In terms of actual performance, probably not, apart from the impulse. I've met a lot of guys that insist that a carbine length system will cycle more reliably when things get really dirty, because the cycle is more abrupt. I'm not really buying into that train of thought yet, although it may have some merit. I've stayed with mid-length as much as possible, as it simplifies my part selection. That's kind of why I was asking. To make a long story short my shooting instructor today was asking why I'm running mid-length when I should be running a carbine length for better cycling and less pressure when handling. I was grouping 5 rds in a size of a fist. when he pulled his rifle out and mind you it was carbine length my groups were way tighter,...same rifle, same rounds, at 30 yards but again,...different tube size. Am I missing something?... |
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What are the details on your rifle? You can't just swap gas tube lengths, you have to swap barrels to one with a longer or shorter gas system in order to change gas tube length. I'm running a 16" melonite barrel 1/7 on mid-length, his is the same but carbine-length |
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Quoted:
That's kind of why I was asking. To make a long story short my shooting instructor today was asking why I'm running mid-length when I should be running a carbine length for better cycling and less pressure when handling. I was grouping 5 rds in a size of a fist. when he pulled his rifle out and mind you it was carbine length my groups were way tighter,...same rifle, same rounds, at 30 yards but again,...different tube size. Am I missing something?... Maybe you just shoot more accurately? Did you guys swap guns and shoot? |
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Quoted:
That's kind of why I was asking. To make a long story short my shooting instructor today was asking why I'm running mid-length when I should be running a carbine length for better cycling and less pressure when handling. I was grouping 5 rds in a size of a fist. when he pulled his rifle out and mind you it was carbine length my groups were way tighter,...same rifle, same rounds, at 30 yards but again,...different tube size. Am I missing something?... Carbine Length vs Mid Length Carbine... Theoretically more recoil Sharper (more violent) gas pulse Probably will function better in adverse conditions (properly maintained rifle, it won't make a difference) Accuracy shouldn't matter on which length is used (bullet has exited the barrel) |
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Maybe you just shoot more accurately? Did you guys swap guns and shoot? thanks and yes, I shot his to see the difference, it didn't change other then the groups being tighter. I also did notice the shells when ejected were closer (about 2 ft) with his. Mine were like 5 ft |
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