I'm going to disagree. I've seen both failure to extract double feeds and true double feeds where the magazine releases two rounds.
It does happen and anyone who is serious about self defense shooting needs to practice every now and then.
I’m going to suggest you focus on better quality pistols and/or magazines if you are “serious about self defense”.
Seriously.
Would you accept a self defense load that does not feed with virtually 100% reliability in your personal self defense weapon? I won’t.
I put at least 200 rounds of my intended self defense load through my self defense handgun spread evenly between my primary and backup magazines with zero failures before I feel comfortable using it. I backstop that with regular expenditure of my carry rounds so over time I have several hundred rounds down range with no failures.
If I *have* a failure, I find out *why* and address the failure.
To eliminate the failure rather than living with a known failure mode that will require immediate action when an otherwise preventable jam occurs.
Why? Despite what all those tacti-cool instructors push, the FBI data is very clear that 75% of all agent involved shoots were over in 3 shots or less fired at 3 yards or less in 3 seconds or less. In other words in 3/4 of the shoots agents were involved in, there simply wasn’t time to deal with a malfunction. It really is an example of an ounce of prevention being worth a pound of cure.
Now… that said:
1. I practice tap-rack-bang drills as the primary immediate action drill if something goes wrong, just on general principle; and
2. I practice dropping the magazine and clearing the weapon as the next up immediate action if tap-rack-bang fails, again on general principle.
As for double feed drills, #2 covers the extremely unlikely occurrence of a double feed when using quality ammo in a quality magazine in a properly maintained quality pistol - and it covers that contingency *without* abusing the extractor in the pistol by staging a double feed.
