"...resting the pistol on sandbags on a bench..."
I am not sure how you are resting the pistol, but don't. Having the pistol, barrel or butt, touch the bags or the bench will cause it to bounce in an unpredictable way every shot.
Put the sand bag(s) on the bench and rest YOUR WRISTS on them, not allowing any part of your hands or the gun to touch the bags or the bench.
That being noted, 6" at 25 yards could be acceptable for a short range defense pistol; it would certainly not be acceptable in target competition at any time.
Jim
I am not sure how you are resting the pistol, but don't. Having the pistol, barrel or butt, touch the bags or the bench will cause it to bounce in an unpredictable way every shot.
Put the sand bag(s) on the bench and rest YOUR WRISTS on them, not allowing any part of your hands or the gun to touch the bags or the bench.
That being noted, 6" at 25 yards could be acceptable for a short range defense pistol; it would certainly not be acceptable in target competition at any time.
Jim