I'm sorry, but any system you have to keep "checking" is not working for you. Saw a fellow the other day look at something on the bottom shelf at a store. He reached behind and held his coat down as he crouched down. That's a pretty obvious tell that he is carrying. Anyone who keeps checking his side or his back is telegraphing that to everyone. I find I must dress "fat" and loose to hide a gun on a daily basis. Some slim guys won't do that, so they try other ways to hide the gun, usually not sucessfully. If you carry a gun as part of your lifestyle, you must accomidate your dress and lifestyle to it. You do not bend over at the waist and pick up something from the floor. You bend your knees and stoop down. If you hug someone, you reach in under their arms first, then theirs are over yours and they can't feel your gun. Your gun must carry on your body in such a way that it will not hook the rungs of a wooden chair when you get up (of clunk on them when you sit down). If you have to move things or reach down and cover your gun, your system is not working and you must try another. As for poping the mag loose in the holster, try cutting away a little leather so it will not press on the release. 44 Man
PS, we all have a box of holsters we have tried that didn't work as expected. I have found that quite often the problem is our belt and not the holster. Many people think a heavy belt is enough but many times it is just not stiff enough to support the holster properly. I use an AKER agent belt with a plastic stiffener in it. It doesn't look like a "gun" belt.