What extra inertia? From slide lock to the slide fully to the rear is what....1/8" of an inch? Compressing that spring 1/8" of an inch is what makes the difference? Give me a break.
How to release a slide is by far the best litmus test to separate actual shooters from the rest of the pack.
If I remember correctly that extra 1/8 inch also helps if you get a maximum length cartridge.
You don't have to do it.
Dink
Explain how a "maximum length cartridge" would sit farther back in a magazine, which is the only scenario where moving the slide back would make a difference.
Any "maximum length would have to be at the front end.
I didn't write the article.
But if I remember correctly it gives the long cartridge plenty of room as it strips off the mag and hits the feed ramp( in case it slides to one side or the other go up the feed ramp). It also gives the slide plenty of power to overcome any extra drag.
Everyone has had the first round out the magazine not feed properly and end up in a stove pipe. I believe that the slingshot method helps prevent this.
Dink
