Re: Trigger control with different platforms
OP,
Here's the bottom line, you've got movement when you pull the trigger. This disturbs aim. The movement is vertical. This can be caused by abandonment of aim, which is forced by the brain upon perception that the two firing tasks are finished. So, the next time you dry fire command yourself to maintain aim with trigger depressed for a few seconds after the firing tasks have been executed. Be sure to pull the trigger SMOOTHLY. And be sure to adjust NPA properly. Do these things and the sight will not leave the target unless you have an issue with getting the proper stockweld, where the full weight of the head is rested on the comb of the stock. If you are now pressing or lifting your head to get the proper eyepiece/eyeball relationship you need to get another mount or an adjustable comb. Never expect the comb height of the box stock rifle to be even close to what is needed for a proper stockweld. Since your problem is isolated to the FN SPR I'd suspect this is a likely source for error.
Once you've got the comb properly adjusted, here are the correct steps: shoulder the rifle, cognisant of the 5 factors of a steady position, but without any consideration for the target. That's to say, do not unconsciously steer the reticle to the target. Also, be sure to bring stock to head rather than head to stock. This will dictate the spot in the pocket formed in the shoulder where the butt will be.
Adjust NPA for the desired hold.
Focus on reticle.
Pull trigger smoothly.
Follow through.
Greg,
Your advice is spot on but what's the shooter going to do with it? He just wants to eliminate the movement. Certainly, as you alluded, if the movement has been accounted for there may not be a consequence but that would require being consistently inconsistent. That's difficult; plus, if the inconsistency produces angular error then even when the inconsistency is consistent there's no telling what the result will be at any but one distance to target.
