I didnt realize we had changed the topic to exclusively handgun use.
That's the context of the OP's firearm - a 1911.
Seat, Roll & Rack leverages commonality of technique so that one set of common actions is consistently performed to intuitively solve multiple problems. It is a technique that is blind to the position of the slide. Every time you Seat the magazine you immediately Roll & Rack to make the pistol battle ready. It is KISS simple:
Seat, Roll & Rack to load
Seat, Roll & Rack to clear a misfire (empty chamber, faulty cartridge)
Seat, Roll & Rack to clear a failure to feed
Seat, Roll & Rack to clear a failure to eject
Seat, Roll & Rack to complete a combat reload
Seat, Roll & Rack to complete a combat reload after clearing a doublefeed
Whereas the technique of manually releasing the slide lock to load introduces inconsistency, it is less fluid and less intuitive:
Seat & Release slide lock to load
Seat, Roll & Rack to clear a misfire (empty chamber, faulty cartridge)
Seat, Roll & Rack to clear a failure to feed
Seat, Roll & Rack to clear a failure to eject
Seat & Release slide lock to complete a combat reload*
Seat, Roll & Rack to complete a combat reload after clearing a doublefeed**
*Potential problem: if slide unexpectedly goes into battery when magazine is seated the shooter will most likely hesitate with indecision (e.g., Uhh, did I inadvertently release the slide lock? Uhh, did a round chamber? Uhh, do I engage the target? Uhh, do I rack the slide?)
** Potential problem: loading is the most frequent action performed by a shooter and the familiarity of “releasing the slide lock to load” might condition the shooter to automatically “release the slide lock” after seating the magazine (wasted motion, more decision-making) instead of intuitively racking slide to immediately load the chamber
I believe that Seat, Roll & Rack is more likely to condition a shooter to quickly and consistently produce a successful outcome under stress than Seat & Release.
I save that for Rules violations and really hot chicks.
A really hot chick "doing it wrong"?! Is THAT possible?
Cheers!