9mm ??
03-02-2005 | 02:09 AM
#11
Nontypical Buck
Joined: Jun 2004
Posts: 3,171
Likes: 0
From: A flat lander lost in the mountains of Northern,AZ
RE: 9mm ??
Cause glock doesn't have normal rifling, and don't follow the same rules as everyone else. Call em and see what they say about it and come back on here and let us know.
Been a few mishaps with cast and glocks. I won't load cast in mine either.
Been a few mishaps with cast and glocks. I won't load cast in mine either.
I do run a bronze brush with some solvent then a dry patch then a lightly oiled patch between every 100 shots or so, but i also do that with all my guns I shoot cast lead through, just as a precaution for lead build up. Havent had any problems yet.
03-02-2005 | 02:26 AM
#12
Nontypical Buck
Joined: Feb 2003
Posts: 4,781
Likes: 0
From: Body in SE WI, mind in U.P.
RE: 9mm ??
Just a guess, but I think most of the lead bullet/Glock Kabooms come from people shooting lead bullets through the barrels followed by jacketed bullets without removing all of hte lead first.
03-09-2005 | 09:42 PM
#13
Nontypical Buck
Joined: Feb 2003
Posts: 3,802
Likes: 0
From: Coralville, IA. USA
RE: 9mm ??
To my understanding, the reason lead bullets shouldn't be shot in Glocks (or most H&K pistols for that matter), is because of the polygonal rifling. If you look down the bore of a Glock you'll notice an absense of traditional lands and grooves, and instead see that the bore, if cross-sectioned, would look like a hexagon (for .40cal and smaller) or an octagon (for the .45cal). The problem with the rifling is that lead is MUCH softer than copper jacketed bullets, and the polygonal rifling doesn't grip the lead as positively as standard rifling, so the bullet can essentially "skip" across the rifling briefly before the rifling grabs it enough to make it spin. This can cause a great deal of sheared off lead to build up right at the throat, which as most know is the worst possible place for lead (or anything else for that matter) to build up, essentially creating a partial bore obstruction. Eventually, if allowed to build up enough, or if jacketed bullets (which won't 'give' under pressure like lead will) are fired after the lead bullets, dangerous pressure spikes can occur. This combined with the partially unsupported section of the case due to the generously sloped feed ramp common to Glocks, makes a badly rupture case and blown up gun (the infamous "Ka'Boom") even more likely.
This is why Glock, and the common wisdom of the Glock shooting community, cautions against the use of lead bullets in Glock handguns with stock polygonally rifled barrels. If you do want to shoot lead in a Glock, it is wise to buy an aftermarket drop-in replacement barrel with conventional land-n-groove rifling.
Mike
This is why Glock, and the common wisdom of the Glock shooting community, cautions against the use of lead bullets in Glock handguns with stock polygonally rifled barrels. If you do want to shoot lead in a Glock, it is wise to buy an aftermarket drop-in replacement barrel with conventional land-n-groove rifling.
Mike
