Actionflies,
Try resting the "dust cover" section of the frame (area just ahead of the trigger guard) on a relatively soft surface (like a sandbag) with the butt of the gun on another soft surface and your arms (between wrists and elbows) on bags, as well. If you delete anything, make it the bag under the grip.
Focus on front sight. If you have old eyes, glasses made to focus at that distance help A LOT.
SL1