Here's a question: does a ported barrel affect the distance that shot travels? Since the ports allow some of the gas, and energy, to be displaced from going out the end of the barrel, I know it dampens muzzle jump; not so much recoil. But does this also reduce the energy behind the shot itself, thereby reducing the distance the shot flies? (Since I don't have a long handicap, I haven't noticed any change in the appearance of targets breaking when using the barrel, with 7 & 1/2, 2 & 3/4, 1200 fps, 3 dr. equivalent AA's.) Thanks for any info, or direction to any former posts and discussion. Just curious.
Effect of ported barrel on shot performance
Paula N.
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Here's a question: does a ported barrel affect the distance that shot travels? Since the ports allow some of the gas, and energy, to be displaced from going out the end of the barrel, I know it dampens muzzle jump; not so much recoil. But does this also reduce the energy behind the shot itself, thereby reducing the distance the shot flies? (Since I don't have a long handicap, I haven't noticed any change in the appearance of targets breaking when using the barrel, with 7 & 1/2, 2 & 3/4, 1200 fps, 3 dr. equivalent AA's.) Thanks for any info, or direction to any former posts and discussion. Just curious.
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14,750 Posts
It does (it has to, technically) but probably not enough that you could measure it.
By the time the shot/wad gets to the end of the barrel, the motive force behind it has dropped substantially (compared to the force pushing it at initial ignition) so I would opine that you would not be able to discern distance traveled between the two (with and without ports), all else equal.
What you are really asking is, does porting affect the muzzle velocity? (because that is the primary determinant for distance traveled, all else equal.) Again, not enough that you could reliably measure and have a statistically different outcome.
In reality, there is probably a bigger difference between the muzzle velocity of one shell and another, than there would be between two identical barrels, one ported and the other unported, if you could compare the two directly.
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I am looking at Double’s Gun a Browning 725 or Beretta 694 and what I don’t like about the Browning is the ported barrel.
But we all can like something different and thats Great, it would be a boring world if all the cars in the parking lot were the same.
But we all can like something different and thats Great, it would be a boring world if all the cars in the parking lot were the same.
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What perfesser Tim said
Testing a 12g 1 oz. 2 3/4 dram load averaged 1180 fps in a 30” barrel
A 28" barrel averaged 1160 fps
So a ported 30" barrel would be the highly scientific exactitude of "in between"
OTOH SAAMI standards allow shell to shell velocity to vary by +/- 90 fps for both game and target loads.
Testing a 12g 1 oz. 2 3/4 dram load averaged 1180 fps in a 30” barrel
A 28" barrel averaged 1160 fps
So a ported 30" barrel would be the highly scientific exactitude of "in between"
OTOH SAAMI standards allow shell to shell velocity to vary by +/- 90 fps for both game and target loads.
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True, but that is on a lot to lot basis, not a shell to shell basis. Within a box of shells, the muzzle velocity won't vary THAT much. Maybe 30-35 fps shell-to-shell within a box.
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Almost surprised there was that much difference!
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Well Paula, if you have several hours to kill, you could do a search on porting. Earlier this year, or maybe last, there was quite a discussion about whether porting was helpful, louder, quieter, than non-ported etc etc. I'd have to agree with timb99 post. Merry Christmas to you and Tom.
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I do not know for sure if ports affect the muzzle velocity. And...I am sure that I will never really need to know either. I just do not do ports for shotguns.
I guess if you're drilling them build up may be a problem. Have several done by magnaport and no plastic build up. Just some powder residue. As far as louder, gripes about that are as popular as any other slam on porting. WEAR HEARING PROTECTION!!! If you think a shotgun can be loud try a compensated 38 super or a 9mm loaded hot. Try a rifle with a muzzle break while your at it. If noise from a ported shot gun is bothering you it's time to re think the hearing protection you're using.
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If you're selling the gun's worth less with ported bbls; if you're buying it's worth more....just ask any gun dealer!
V/r
Maxey
V/r
Maxey
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I can see that there is going to be a dire shortage of dead horses before this winter is over
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I think you mean a surplus of
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