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November 10th, 2017, 08:40 PM #1
Glock barrel question/observation
Is it me or are the grooves in a 9mm Glock 17 barrel much more shallow than other barrels from other 9mm pistols?
Am I imagining this? Or are the grooves actually more shallow?
If so, I'm guessing the mindset is much like with marlin using shallow grooves for less bullet deformation and hopefully better accuracy.
-Zach
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November 10th, 2017, 08:44 PM #2Grand Member
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Re: Glock barrel question/observation
Is this your first gun with polygonal rifling? Just curious...
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November 10th, 2017, 09:22 PM #3Super Member
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Re: Glock barrel question/observation
rifling.jpg
Glock barrels look like B.
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November 10th, 2017, 09:37 PM #4
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November 10th, 2017, 09:38 PM #5
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November 10th, 2017, 10:11 PM #6Grand Member
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November 10th, 2017, 10:22 PM #7Super Member
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November 10th, 2017, 11:24 PM #8Grand Member
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Re: Glock barrel question/observation
I hope that didn't come off the wrong way. I sometimes sound like a jerk when I don't mean to.
In any case, if you're curious, polygonal rifling is supposed to improve durability (since there's no sharp edges on the rifling to wear), velocity (since it forms a tighter seal around the bullet, and the grooves are smaller which means fewer gases escape), and some say accuracy. Some will also say that you shouldn't shoot non-jacketed lead in a polygonal rifled barrel, as some say that lead more easily builds up in polygonal rifled barrels, which causes constriction over time and a catastrophic failure (kaBoom). They are most often found in HK and Glock handguns.
ALL of that (except for being found in HKs and Glocks) is debated to no end on the Internet. People will argue that the velocity is not tangibly different, that the accuracy difference doesn't exist, and that you'll never shoot enough to wear out a lands-and-grooves rifled barrel. You'll also see people saying that you can shoot lead bullets out of polygonally rifled barrels.
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November 11th, 2017, 12:08 AM #9
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November 11th, 2017, 01:17 PM #10
Re: Glock barrel question/observation
Yeah, to me they look more ilke someone twisted the barrel. Supposed to make a tigher seal between the bullet and the barrel yada yada yada....all it really does is keeping you from shooting lead. I will say my poly AR15 barrel seems far more accurate then any other AR i ever shot.
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