In the interest of minimizing wasted motion, this procedure occured to me some time back & I practice it regularly at the range, but I've never seen or heard of it anywhere else, good or bad. I'm interested in feedback & pros / cons.
The procedure is to count the rounds fired. I carry 15 + 1 in the pipe. Once I've fired 15 shots, the last round is loaded into the chamber & the magazine is empty, that is the time I dump the empty magazine & "tap" a fresh magazine & immediately continue firing, preventing the slide from ever locking back from an "empty" condition. The effect is that the "tap & rack" process becomes just a "tap" process before resuming firing. This save the "rack" process, which for me is what takes my aim off target somewhat.
This would apply whether you have a 7 rnd mag or a 17 rnd mag, and it does require keeping track of shots fired / rounds remaining, which I think is a good idea regardless, instead of being surprised /caught off guard when the slide locks back on empty, which I see frequently at the range.
The down side that you are reloading with a live round ready to fire, with the safety off (if applicable) , the slide forward, and the hammer back (if applicable) . Therefore, you MUST have heghtened focus on the most basics of safety of;
1. keep your trigger finger OFF the triger while reloading
2. keep your firearm pointed down range / on target while reloading
I've never been involved in a shooting & hope I never am, & certainly not one involving firing more than 16 rounds, but we have to be prepared for the worst & "what if" ourselves to the max. Many carry 1 or more extra mags for a reason, so might as well be ready to use 'em.