I always use QuickLoad software to validate my loads after doing published research and then backing it up with velocity measurements. Some of those loads at a COAL of 1.110 inch calculate much higher pressures than the +P spec of 38,500psi max. At a \”standard\” COAL of 1.169 they calculate out at +P max pressure and therefore seem OK for +P loads. I have discovered, sometimes the hard way, that the beauty of 9mm is the ability to seat the bullet at different COAL\’s. But that opens you up to distinct variations in chamber pressure. The deeper the bullet seating the higher the chamber pressure (and velocity).
My question is whether a match grade barrel means it is a precision fit chamber or does it mean that the chamber can take much higher pressures than a standard fit chamber? Or maybe both? I prefer to shoot my very powerful 9mm loads out of 1911 or 2011 firearms under the assumption (mine) that that chamber OD sized for a .45ACP cartridge has enough extra steel around the chamber for a very high pressure 9mm cartridge.
Any thoughts, data, or info?