Glock Pro Forums banner
1 - 13 of 13 Posts

·
Administrator
Joined
·
6,979 Posts
Wondered myself, so I looked it up... Here's what the Glock Wiki says:

Glock Wiki said:
The barrels of all .45 ACP Glock pistols feature octagonal polygonal rifling rather than the hexagonal shaped bores used for models in different chamberings.[48] Octagonal rifling provides a better gas seal in relatively large diameter rifled bores, since an octagon resembles a circle more closely than a hexagon.
Don't know if that's the absolute truth, but it seems reasonable to me.

I don't think it would change anything related to shooting lead... The octagonal barrel might make shooting lead worse... less area for the lead to fill before causing problems.
 

·
Premium Member
Joined
·
564 Posts
I just means that there are 8 lands in the .45acp GLOCK barrel (21 and 30 models) and 6 in the rest (9mm, 357sig, 40s&w). Also, Im not quite certain, but I believe the GAP models use 8 land barrels. Further more, its still the same type of rifling as the 6 land barrels, so no lead bullets.
 

·
Premium Member
Joined
·
564 Posts
Let me make one correction to me previous statement. You can shoot lead bullets out of any GLOCK, it just that GLOCK INC doesn't recommend it due to lead bullets leading the barrel. You can shot low quantities at a time of lower speed ammo, just make sure to thoroughly clean the barrel of any lead before shooting jacketed bullets. Hope this helps.
 

·
Registered
Joined
·
2,027 Posts
it's just a different type of rifling. it is far easier to get polygonal rifling spotless when cleaning than standard rifling, and there aren't sharp crevices that crud can hide in.

as to the claim that glock's polygonal rifling produces better muzzle velocity, it's been tested at maybe only 10fps faster at the most (it does seal in gases slightly better than standard rifling, but the results are minimal).

 

·
Premium Member
Joined
·
5,854 Posts
Agree with Don and _jb. My guess is that unless you reload your own, or have a really good friend that reloads and likes you a lot, it's not going to be cheaper for the average shooter.
 

·
Registered
Joined
·
33 Posts
or have a really good friend that reloads and likes you a lot, .
This is me. For Christmas, my retired Father-in-Law gave me 1200+ lead 9mm rounds. I fired 200 of 'em yesterday, and other than not being as accurate as commercial loads, they went bang and punched paper. I did clean the you know what of the barrel last night, but I do that no matter what I shoot.

Seeing I have over 1000 still togo, is the Glock nylon brush good enough to clean the barrel? Is there a brass type brush available that would beven better? Is it the rifling or the chamber that the problem is from? Just questions for those who know more than I.
 

·
Administrator
Joined
·
6,979 Posts
At the very least you will want to make sure you are using a solvent that will remove lead. Something like BoreClean or Hoppes #9...

Maybe someone that has shot a lot of lead can give you some better advice...
 
1 - 13 of 13 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top