I recently bought a Rock Island 9mm 1911 for concealed carry. I shot about 1000 rounds of factory ammo in it to break it in and decided it should be ready as my carry weapon.
I loaded the mag with +P+ and racked the slide. It jammed. I cleared it and re-racked it. Another jam. After 6 jams I realized it would not feed this shortened hollow point ammo.
As I researched more, I learned that 9mm 1911s do not like the shorter length of hollow point ammo. I know that if a bullet is seated deeper in the case, the chamber pressure goes up, in some cases, astronomically. The normal chamber pressure for 9mm is in the 30,000 PSI range, while +P+ is around 38,000.
I surmise that if I reseat the hollow point slug to whatever the recommended max length so it feeds (I don’t have my manual handy and disremember that spec), the chamber pressure should drop and I will not have my desired +P+ characteristics.
Since SAAMI does not even mention +P or +P+ ammo, I have no way to determine what loads I should work on to develop a longer overall hollow point +P+ load.
So at this point I’m wondering about building a pressure tester. I have the machining facilities to build such a test setup and wonder if anyone has built a transducer-type tester so I can directly read pressure on some type of digital readout.
DISCLAIMER
This is not something I would be doing for anyone else so don’t bother telling me about any liabilities. That’s all crap and all lawyers should be killed, as they have abused their once noble craft to the point of everybody suing everybody else for everything. Now go away….
I loaded the mag with +P+ and racked the slide. It jammed. I cleared it and re-racked it. Another jam. After 6 jams I realized it would not feed this shortened hollow point ammo.
As I researched more, I learned that 9mm 1911s do not like the shorter length of hollow point ammo. I know that if a bullet is seated deeper in the case, the chamber pressure goes up, in some cases, astronomically. The normal chamber pressure for 9mm is in the 30,000 PSI range, while +P+ is around 38,000.
I surmise that if I reseat the hollow point slug to whatever the recommended max length so it feeds (I don’t have my manual handy and disremember that spec), the chamber pressure should drop and I will not have my desired +P+ characteristics.
Since SAAMI does not even mention +P or +P+ ammo, I have no way to determine what loads I should work on to develop a longer overall hollow point +P+ load.
So at this point I’m wondering about building a pressure tester. I have the machining facilities to build such a test setup and wonder if anyone has built a transducer-type tester so I can directly read pressure on some type of digital readout.
DISCLAIMER
This is not something I would be doing for anyone else so don’t bother telling me about any liabilities. That’s all crap and all lawyers should be killed, as they have abused their once noble craft to the point of everybody suing everybody else for everything. Now go away….