Deavis
Member
My buddy bought himself a Glock 20C and said, "Hey can we reload for this?" I tell him, sure we can, we just need some brass. The guy I normally get brass from doesn't have any 10mm processed but he says that he has some once fired out of an MP5 that we could use if we wanted. Great price and we just culled out the brass that was cracked or heavily marked from the fluted barrel.
Now, we get to the part where I ask him, "How strong do you want these loads to be?" The response, "What is the maximum amount I can cram in there?" After a quick discussion about unsupported barrels and reloading a caliber I have never done before, he is undettered. So I said, "Your gun, your call."
The result? Case head blow-out. It pinches your hand a little and also throws the extractor plunger out towards the target. Easy to fix and less that $4 per incident if you can find the extractor. Pictures are, of course, attached.
The blowouts (two of them because my buddy just had to prove to himself that it was the brass and not the load) occured within 7 shots of starting a heavy load string. Note they are the Federal brass in the picture
So, two extractor plungers later, a KKM fully supported barrel, a Colt Delta Elite, a 3-1/2 lb. trigger, steel guiderod, and Starline brass we have the following results. (Yes, he got it fixed at the gun show and had money to burn )
1.260"OAL, WLP, Starline, 78°C, Sunny, no wind, 9 foot to chrono, 180GR MGB JHP
* Powder (load/max):Average, Extreme Spread, SD
Colt Delta Elite
* WSF (6.9/7.1gr): 1064.8, 33.9, 12.8
* 231 XXXXXXXXXXXXXXXXXXX
Glock 20C w/ KKM barrel
* WSF (6.9/7.1gr): 1079.8, 24.9, 8.21
* 231 XXXXXXXXXXXXXXXXXXX
Glock 20C w/ Factory ported barrel
* WSF (6.9/7.1gr): 1027.83, 29.1, 9.63
* 231 XXXXXXXXXXXXXXXXXXX
It is worth noting that after shooting several hundred rounds of the original loads, which were close to max AA9, TiteGroup, and PowerPistol, through the KKM barrel, not a single one had the violent failure seen with the factory barrel. It is worth noting that a few, maybe 3 or 4 showed hairline cracks right at the extractor groove and each time you could feel the gas escaping when firing the gun. It really does feel like you've been pinched and there is a small sootprint on your hand. However, the casehead does not blow-out.
Now, we get to the part where I ask him, "How strong do you want these loads to be?" The response, "What is the maximum amount I can cram in there?" After a quick discussion about unsupported barrels and reloading a caliber I have never done before, he is undettered. So I said, "Your gun, your call."
The result? Case head blow-out. It pinches your hand a little and also throws the extractor plunger out towards the target. Easy to fix and less that $4 per incident if you can find the extractor. Pictures are, of course, attached.
The blowouts (two of them because my buddy just had to prove to himself that it was the brass and not the load) occured within 7 shots of starting a heavy load string. Note they are the Federal brass in the picture
So, two extractor plungers later, a KKM fully supported barrel, a Colt Delta Elite, a 3-1/2 lb. trigger, steel guiderod, and Starline brass we have the following results. (Yes, he got it fixed at the gun show and had money to burn )
1.260"OAL, WLP, Starline, 78°C, Sunny, no wind, 9 foot to chrono, 180GR MGB JHP
* Powder (load/max):Average, Extreme Spread, SD
Colt Delta Elite
* WSF (6.9/7.1gr): 1064.8, 33.9, 12.8
* 231 XXXXXXXXXXXXXXXXXXX
Glock 20C w/ KKM barrel
* WSF (6.9/7.1gr): 1079.8, 24.9, 8.21
* 231 XXXXXXXXXXXXXXXXXXX
Glock 20C w/ Factory ported barrel
* WSF (6.9/7.1gr): 1027.83, 29.1, 9.63
* 231 XXXXXXXXXXXXXXXXXXX
It is worth noting that after shooting several hundred rounds of the original loads, which were close to max AA9, TiteGroup, and PowerPistol, through the KKM barrel, not a single one had the violent failure seen with the factory barrel. It is worth noting that a few, maybe 3 or 4 showed hairline cracks right at the extractor groove and each time you could feel the gas escaping when firing the gun. It really does feel like you've been pinched and there is a small sootprint on your hand. However, the casehead does not blow-out.
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