I made a free script that does this it changes the way you reload, instead of using the ammo you just press R to reload and takes the ammo from your stack for example if you have 50 bullets and your clip holds 10 then you can press R to reload and it will take 10 bullets from your stack of ammo in your inventory and load it into the gun leaving you with 40 in your inventory and 10 in your gun ( a full clip) it also removes the progress bar.
Overall it makes reloading similar to other games where you simply press R to reload and it removes the ammo from your inventory and put it into the gun