Like the man said - Shoot it from the bench, single action (cock it first) with non +P 158 grain bullets and see what's going on. Keep your eye's focus on the gun's FRONT SITE. You want to keep the FRONT SITE aligned with the rear site even after the round goes off... You most likely won't be able to, but TRY (also known as Follow Through).
The good ol'
US Army Pistol Training Guide is a great resource.