StrikeFire83 said:
How many rounds of a certain ammo must your pistol cycle before you trust that ammo?
I test firearms to make sure that they work with my ammunition, not the other way around. This is primarily because I only shoot a few different loads but own many different pistols. If there's a problem, it's the firearm not the ammunition. This wasn't always the case but I can now say that after recent improvements in one particular load.
I have a specific test format I adhere to with new pistols using every
type of magazine that I own for that pistol (currently five for 1911s). The vast majority of my pistols are chambered in .45 ACP (twelve at last count) so this example is appropriate.
1. 50 rounds of the easiest feeding reload > 230gr FMJ
If the pistol passes this test without a single problem move on to test #2. If not, figure out the problem with the pistol or magazines and repeat test.
2. 50 rounds of the easiest feeding lead reload > 200gr LRNFP
If the pistol passes this test without a single problem move on to test #3. If not, figure out problem with the pistol or the magazines and repeat the test.
3. 50 rounds of the hardest feeding lead reload > 185gr LSWC
If the pistol passes this test without a single problem move on to test #4. If not, figure out the problem with the pistol or the magazines and repeat the test.
4. 50 rounds of a self defense load > Hornady 230gr XTP JHP
If the pistol passes this test without a single failure it's one heck of a good pistol. My SIG P220s have no problem getting to this point and I'm sure that a GLOCK wouldn't either, but 1911s are precision implements and may need a little more convincing. No pistol has successfully completed test #3 and failed test #4.
At this stage, a good pistol will have shot through 200 rounds without a single issue. A new Ed Brown passed this test last Friday, two Dan Wessons didn't with both failing on test #1. The same magazines were used for all three 1911s. The failures were more than likely due to two magazines but were significant enough that they'll be starting at test #1 next time.
Based on my test procedure, I chose 200 rounds.