I am new to pistol reloading. I have reloaded a lot of ammo for bolt action rifles. The biggest gains in accuracy I saw in rifle ammo was loading the bullet out as close to the rifling in the barrel as possible without actually contacting it. I assume the same thing holds true for a pistol. I realize that bullet shape has a lot to do with it, but what oal do most of you use in your XD's to gain accuracy and still fit in the mag and function? I obviously wont be decreasing oal below the recommended load data due to the potential for increasing pressure. I have loaded a few rounds for my XDm 40 4.5" that are fairly accurate (probably more accurate than I can shoot them) but I can probably do better. Everything I have loaded so far has been at 1.125".