Everything else can be correct, but a bad trigger pull can ruin the shot.
Exercising proper trigger control starts with correct trigger adjustment. The triggers on all my rifles have their overtravel stops removed entirely. I want free movement in the trigger after I break a shot because that allows me to be aggressive with my trigger pull. If the finger comes to a stop at or shortly after the point in trigger travel that the shot broke, that stop can move the rifle when the bullet is still inside the barrel.
The rifle is normally moving offhand. Trigger control, therefore, is ultimately responsible for positioning the bullet on the target on an offhand shot. Everything else can be correct--hold, sight picture--but a bad trigger pull can ruin the shot. The technical fundamental is to move the trigger without moving the rifle. This ability is easy enough to develop through dry-firing.
I believe that the Anschutz two-stage trigger is the finest available, and I've used one on my competition rifles for years. This is the same trigger found on Anschutz smallbore competition rifles. Incorporating an Anschutz into a Winchester or Remington platform requires a good deal of modification, but it's the native trigger in the TUBB 2000.
A properly set-up Anschutz trigger has enough spring tension in the trigger's arc of movement that it will effectively stop the finger from needless movement after the shot breaks. For any shot fired prone, sitting or in calm conditions offhand, the spring tension in the trigger itself will stop the rearward movement of the finger in virtually the same spot as an overtravel stop might.
MECHANICS
I don't want to give the impression that I yank back the trigger to make every shot, although I will say that I often do something close to that when firing offhand in high wind. I always move the trigger smoothly, but there is a variance in the speed or acceleration of the trigger movement when I won't see a quality sight picture for very long. I don't pull the trigger any harder or more forcibly, just more quickly. An accelerated start on the trigger results in more overrun compared to what I experience in a calm-condition shot. Just like a vehicle, the faster it goes, the longer it takes to stop. A longer arc of trigger movement means this doesn't matter.
I touch the trigger face using only the tip of my finger. There is less movement required from the tendons and muscles to produce movement nearer the fingertip and overall greater sensitivity in this area of the finger. If we divided the surface of the first joint of the index finger into thirds, I would have only the forwardmost third touching the trigger face. I am also shooting nearer the side of my finger pad rather than on its center. That is the natural spot found by most people when touching the fingertip and the thumb together, such as when picking up a pencil. I am also shooting with approximately eight ounces in each of my trigger's two stages. I would suggest moving the trigger contact point in a little if trigger weight is higher (one pound in the second stage or more than two pounds total weight) to approximately halfway down the finger pad and also more centered in the pad.
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