added insurance for G22 .40 with Bar-sto- barrel?

dgang

New member
I have been reading more and more about the danger of the unsupported case in a .40 Glock and have gotten to the point where I'm wary of shooting any kind of reload in my G22, but realize that there are 10s of thousands of Glocks out there probably firing millions of reloads.
As is my habit for reloading, I start with a powder charge of 92% of stated max load and work up to 96-97% of the "do not exceed" looking for signs of excess pressure along the way. If there is none I stay with the same amount of powder,97% of max, as long as the other components remain the same for the recipe. I also seat the bullets out as far as reasonably possible to reduce pressure in case I accidently throw a few extra granules in the case.
Today I was shooting a load I have been working up(8.4 gr. of blue dot, about 95% of max 8.8 gr., with a 180 gr. Hornady XTP bullet) and the gun damn near seemed to blow up. It kicked the spent case about twice as far as usual and the recoil seemed a LOT more powerful, jerking my hands about 2 feet into the air. The report was enough for the other shooters around me to look in my direction. Luckily I was using new Star-line brass. I don't know what went wrong, but I think I was close to a disaster.
Finally the question. If the load had been a little more powerful I'm sure I would have experienced a kb. Would a Bar-Sto barrel have prevented this? I not thinking of buying one in order to produce more powerful loads, but just thinking of added insurance in case of a similar accident. Also, does the Bar-Sto barrel actually offer more support or does it just have closer tolerances making it stronger. I understand they will also shoot lead bullets and are more accurate. The lead bullets are not important but the improved accuracy would be nice.
Any thoughts and/or ideas on the Bar-Sto would be appreciated. And thanks for reading this overly long question. PS The remaining XTP loads are being disassembled. Good shootin' to you all. dgang
 
Dgang, if you are seeing bulges in your cases near the rim then I'd worry that the round wasn't fully supported. But I was under the impression that Glocks used a ramped barrel the fully supported the round. If that is indeed the case then as long as you aren't seeing signs of excess pressure I don't think you are about to blow up the gun. If I was concerned, even though no signs were present, I'd back off the powder charge. What is near max for one gun can be beyond max for another. George
 
Dgang, Yes, there is a portion of the case on Glock 40's that is unsupported. Excessive pressure or a weakened case from too many reloads could potentially cause you problems. Also, Glocks rifling type does not lend itself to non-jacketed bullets. The lead build up will cause excessive pressures fairly quickly. If I were reloading for a Glock 40 I would switch to a good aftermarket barrel. It's cheap insurance and more accurate.

You'll find extensive information on the KB's in the http://www.glocktalk.com forums.

Good shooting, Jim
 
i shoot 180 with 8.8 bluedot in my 40 s&w in my p229 sig no problem.col of 1.130 that can have a lot to do with pressure as well,thanks,keith
 
Like George said, each gun is unique. Normal for one may be hot for that one's sister of same make and mode.

Nuther thought, you may have had bullet setback in the loud one. You want to make sure you have enough neck tension on all of your loads. Even factory stuff if it is anywhere near hot.

Sam
 
I have a BarSto in my Glock21. It would be hard to accurately measure, but conservatively I'd say the Glock barrel has 4x the unsupported case as the BarSto. Actually the G21 has the most unsupported case of any of my seven .45acp's. If I shot .40's in a Glock I'd get a BarSto.
 
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