Island Beretta
Member
This has been beaten to death but let me see if I can help. The Glock chamber is cut low so a proportion of the necessary chamber support is not there. Other guns have unsupported chamber but the Glock is probably one of the less supported ones. Do a search for Stephen Camp in his XD range report and you'll see some pictures of the chamber showing the case head exposure.
A .40 S&W is a high-pressure round (hence no defn. of +P for it) and it's pressure curve is steep for case volume changes. This means that if you have a bullet setback the resulting reduction in case volume will cause a significant increase in pressure.
Glock was originally built as a military gun and worldwide the most popular handgun military rounds are the various types of 9mm. They (Glock) had chambered theirs in 2 types of 9mm: 9mmx19 and 9mmx 18. The .40 S&W was an opportunity seized by Glock in which they saw a hit with this round in the American market and they were not wrong. They even beat the developer of the .40 round to the market with a pistol.
Why hasn't Glock fixed this? Well the 9mm is the top seller worldwide.
IMO, the .40 will probably never qualify as a worldwide military round due to its basic design, as military ammo are made under various specs and stored under various conditions with weapons kept also in various state of cleanliness. To use a round that is so sensitive to spec changes in the field where you do not have absolute control over QC or the source of ammo would not be smart.
A .40 S&W is a high-pressure round (hence no defn. of +P for it) and it's pressure curve is steep for case volume changes. This means that if you have a bullet setback the resulting reduction in case volume will cause a significant increase in pressure.
Glock was originally built as a military gun and worldwide the most popular handgun military rounds are the various types of 9mm. They (Glock) had chambered theirs in 2 types of 9mm: 9mmx19 and 9mmx 18. The .40 S&W was an opportunity seized by Glock in which they saw a hit with this round in the American market and they were not wrong. They even beat the developer of the .40 round to the market with a pistol.
Why hasn't Glock fixed this? Well the 9mm is the top seller worldwide.
IMO, the .40 will probably never qualify as a worldwide military round due to its basic design, as military ammo are made under various specs and stored under various conditions with weapons kept also in various state of cleanliness. To use a round that is so sensitive to spec changes in the field where you do not have absolute control over QC or the source of ammo would not be smart.