There are reliability issues with an officers length barrel (4"). It has to do with the slide velocity. The slide weighs less and therefore the velocity is increased, this and a shorter slide means a shorter stroke it will make changing the timing of everything. The 4" guns can be reliable if you keep the gun in tune, ie, change the recoil spring every 500 rounds, keep the gun fairly clean, keep your mags clean and a good spring and follower in them. They are more sensitive to things like grip, and thumbs riding the slide too. A gorilla grip will increase slide velocity, especially with a weak recoil spring, riding the slide with your thumb will of course decrease slide velocity. Too much slide velocity will cause issues such as the ammo nosediving into the feedramp, and decrease velocity will of course cause failures to return to battery. Recoil is not bad with a short barreled gun especially if it has a cone barrel like the Wilson Combat CQB compact (see avatar). I have had a Colt compact, a Kimber compact and a Wilson compact. So far the Wilson has been the most reliable followed by the Kimber with Colt in the rear. The Colt did do much better with Wilson magazines. The general consenses is that a 41/4" barrel (commander length) is the shortest length to maintane utmost reliability.
Good luck,