I don't have a Glock, but, knowing that a few folks here have one and may put reloads through it, I thought this might be of interest.
http://greent.com/40Page/general/kb.htm
http://greent.com/40Page/general/kb.htm
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For those of you who reload for a Glock .40, read this.
- Thread starter feddoc
- Start date
Thank Feddoc- a few other items to consider. I load a fair amount of .40 every month for my G23. In fact, some of my 40 brass has been fired 6 to 9 times before I discard and work new brass. It depends on stretch and material thickness of the brass.
1. Glocks do not have fully supported chambers as a whole, so actually this topic is not new. If you want a fully supported chamber, there are aftermarket drop in barrels to consider. Me? I stick with a factory barrel about 90% of the time.
2. Factory new ammunition can and will be susceptible to over or double charging just like reloads. Anything made by machines will have an error frequency associated with it.
3. The case head in the bottom photo doesn't tell the entire story. Either the projective wasn't seated properly or the chamber wasn't reamed properly. Or it was over charged with propellant. Who knows for sure by that photos.
Personally one can reduce the overcharge frequency by following a couple of easy steps and procedural habits. For example- I never place a projectile on the brass unless I visually look down the brass and see if the load charge looks more or less correct. If it looks about right- them I place the bullet on the case mouth and begin the seating stroke. If I stroke and I can't remember if I looked down the case prior- that round goes to the bullet puller tray for later disassembly. I take no chances in this department. I catch myself about once every 200 to 400 rounds in pistol and never in rifle as I manually powder measure each case prior to seating bullets, so no chance of error there.
Another way to prevent double charging is to use a low density powders like Alliant "Power Pistol". A proper charge with the lower density powder fills the case more and in the event of a double charge- the powder will likely overflow and visually alert you that you blew it. Lower density powders- not so obvious depending on the caliber.
I mostly use Hodgdon Universal Clays for .40 as I notice a slightly better/cleaner burn and more consistent speeds. I load my .40's for the G23 at 5.9 to 6.0 grains of Universal with 155 grain Montana Gold HP's using the stock Dillon 550B small powder bar. COAL is about 1.120" to 1.125" as I machine load all my pistol.
In summary- There is more to the story than the article presents. That case head "looks" to be positioned about right for a Glock. Mine look similar in the G23 chamber to that photo when chambered. My 45 (G36) and 9 (G17) also look to be positioned similarly. I also trust my powder charging and seating process over factory ammo as I wasn't there watching them load their ammo. Anal?- YES, but that's just me. That said I always leave factory manufactured HST's and GDHP's in the mags for personal defense preps. In California, should you have to use you weapon in self defense- reloads are not the way to go. (PM me for details if you like.)
For the novice re-loader I have a couple of tips- No radio on in the room- No talking in the room- No phone calls in the room, yes, as sterile an environment as possible. Once your habits are adequately drilled into your brain (for me 3 months minimum of weekly loading)- maybe a radio after that- but never allow yourself to get complacent. If you do- That's when the kaboom frequency appears its ugly head.
Good food for thought Feddoc. The penalty for failure in reloading can be significant. I'd like to see some objective statistics on kabooms in various products. If it were a unique problem with Glocks- I don't believe they'd sell so well.
1. Glocks do not have fully supported chambers as a whole, so actually this topic is not new. If you want a fully supported chamber, there are aftermarket drop in barrels to consider. Me? I stick with a factory barrel about 90% of the time.
2. Factory new ammunition can and will be susceptible to over or double charging just like reloads. Anything made by machines will have an error frequency associated with it.
3. The case head in the bottom photo doesn't tell the entire story. Either the projective wasn't seated properly or the chamber wasn't reamed properly. Or it was over charged with propellant. Who knows for sure by that photos.
Personally one can reduce the overcharge frequency by following a couple of easy steps and procedural habits. For example- I never place a projectile on the brass unless I visually look down the brass and see if the load charge looks more or less correct. If it looks about right- them I place the bullet on the case mouth and begin the seating stroke. If I stroke and I can't remember if I looked down the case prior- that round goes to the bullet puller tray for later disassembly. I take no chances in this department. I catch myself about once every 200 to 400 rounds in pistol and never in rifle as I manually powder measure each case prior to seating bullets, so no chance of error there.
Another way to prevent double charging is to use a low density powders like Alliant "Power Pistol". A proper charge with the lower density powder fills the case more and in the event of a double charge- the powder will likely overflow and visually alert you that you blew it. Lower density powders- not so obvious depending on the caliber.
I mostly use Hodgdon Universal Clays for .40 as I notice a slightly better/cleaner burn and more consistent speeds. I load my .40's for the G23 at 5.9 to 6.0 grains of Universal with 155 grain Montana Gold HP's using the stock Dillon 550B small powder bar. COAL is about 1.120" to 1.125" as I machine load all my pistol.
In summary- There is more to the story than the article presents. That case head "looks" to be positioned about right for a Glock. Mine look similar in the G23 chamber to that photo when chambered. My 45 (G36) and 9 (G17) also look to be positioned similarly. I also trust my powder charging and seating process over factory ammo as I wasn't there watching them load their ammo. Anal?- YES, but that's just me. That said I always leave factory manufactured HST's and GDHP's in the mags for personal defense preps. In California, should you have to use you weapon in self defense- reloads are not the way to go. (PM me for details if you like.)
For the novice re-loader I have a couple of tips- No radio on in the room- No talking in the room- No phone calls in the room, yes, as sterile an environment as possible. Once your habits are adequately drilled into your brain (for me 3 months minimum of weekly loading)- maybe a radio after that- but never allow yourself to get complacent. If you do- That's when the kaboom frequency appears its ugly head.
Good food for thought Feddoc. The penalty for failure in reloading can be significant. I'd like to see some objective statistics on kabooms in various products. If it were a unique problem with Glocks- I don't believe they'd sell so well.