Glock's unsupported chamber issue.
- Thread starter Gitz
- Start date
RevolverRodger
CGN Ultra frequent flyer
- Location
- Somewhere in QC
If you are scarred of your glock's unsupported chamber please send it over to me 
- Location
- Ontario, Kanada
But then you won't have any way to get spare parts
I had an interesting discussion with a ballistics tech at Hodgdon a week ago concerning one of their powders in .40 S&W and lead bullets.
The upshot of the conversation was that they don't publish data for lead bullets and their powders because they get occasional unexplained pressure incursions with the .40 S&W and lead bullets. They are puzzled by them because they don't get the same thing with similar cartridges running at similar pressures i.e. 9mm, 38 Super, 10mm and particularly .357 Sig. He said they would expect the same results particularly with the Sig, but it doesn't happen, and they're left scratching their heads.
He also said this was of particular concern to them because of the unsupported chamber issue with some firearms, and the fact that where a more supportive chamber might contain the pressure of one of these spikes, the "unsupported chamber" might allow the case to rupture. Ergo, no load data from them for lead bullets in .40 S&W.
I did ask him if they had ever seen a pressure spike on their equipment while shooting jacketed bullets in .40 S&W. His response was "never".
If you want more info than that, you'll need to phone Hodgdon and talk to them yourself.
Of course, I simply avoid the whole issue by shooting a Browning High Power in .40 S&W. If I had to have a more modern WunderMatic, the S&W M&P would be my first choice. I shot it, a Glock, a Sig, and an XP at the range; my BHP was still my preference, but I'd take the M&P over the rest.
In fact, my wife will probably be finding an M&P compact under the Christmas Tree...
The upshot of the conversation was that they don't publish data for lead bullets and their powders because they get occasional unexplained pressure incursions with the .40 S&W and lead bullets. They are puzzled by them because they don't get the same thing with similar cartridges running at similar pressures i.e. 9mm, 38 Super, 10mm and particularly .357 Sig. He said they would expect the same results particularly with the Sig, but it doesn't happen, and they're left scratching their heads.
He also said this was of particular concern to them because of the unsupported chamber issue with some firearms, and the fact that where a more supportive chamber might contain the pressure of one of these spikes, the "unsupported chamber" might allow the case to rupture. Ergo, no load data from them for lead bullets in .40 S&W.
I did ask him if they had ever seen a pressure spike on their equipment while shooting jacketed bullets in .40 S&W. His response was "never".
If you want more info than that, you'll need to phone Hodgdon and talk to them yourself.
Of course, I simply avoid the whole issue by shooting a Browning High Power in .40 S&W. If I had to have a more modern WunderMatic, the S&W M&P would be my first choice. I shot it, a Glock, a Sig, and an XP at the range; my BHP was still my preference, but I'd take the M&P over the rest.
In fact, my wife will probably be finding an M&P compact under the Christmas Tree...
Well, glock certainly wasn’t the original polymer pistol, nor was it the first gun that looked like a turd with a handle. It was however, quite possibly the first gun to combines those two characteristicsNow we see so many different firearms with a "glock look", what’s the old saying? "Imitation is the best form of flattery."
Hodgdon are the ones who do the most testing with loads using their powders. Lee might have a hard time selling .40 bullet moulds and yet not providing data for their use.
I don't think the ballistics dude from Hodgdon was making up stories about their observing pressure spikes in .40 S&W loads using lead bullets. Nor do I think they are incompetent.
If you have reservations about this or think it isn't correct, then probably the best thing is to phone Hodgdon's tech support and speak with them yourself.
Well, glock certainly wasn’t the original polymer pistol, nor was it the first gun that looked like a turd with a handle. It was however, quite possibly the first gun to combines those two characteristics
Who brought out the first one??
Just answered my own question.
http://en.wikipedia.org/wiki/Heckler_&_Koch_VP70
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