It has been called a number of things: the Tactical Reload, Select Reload or the Reload with Retention. Call it what you want, but for whatever reason, a person involved in a gunfight has fired a few rounds and has decided they have time to reload.
Bullets are flying, you need to reload, and this is no time for cerebral flatulence. The question is what technique do you use for the ammunition replenishment process? Logically, the decision depends on two major factors: the weaponry being utilized, and the specific circumstances and progression of the fight. Obviously if a magazine tube-fed shotgun