When aiming in DA I do seem to hit where I want.Its when in SA that where I aim is low and right,and yes grouping is comparable in both SA and DA .---Scooter
I think, with what little understanding that I have of shooting, that if you are grouping well in both DA and SA mode, but the point of impact changes with the mode of shooting, then you don’t have a trigger jerk problem per say.
My thought is that if you were jerking the trigger enough to move your POI, in one mode relative to the other, then your group in one or the other mode would open up and/or even string out.
My guess is that how you hold the firearm changes with the mode you shoot. By hold I don’t mean how you place your hands on the firearm (which of course should be same), as much as the amount of tension you put into the muscles of your hands, arms and shoulders. This is very a natural thing to do if the trigger pull in DA and SA differ a lot.
It’s also natural to hold the firearm with as little strength as necessary to keep the sights on target and of course that differs with the amount of force needed to pull the trigger back.
So you might try, along with the other suggestions in this thread, ensuring that you hold the firearm with the same amount strength in each mode. You might also try only shooting a few rounds before putting the firearm down (unloaded of course) and resting a little.
Of course I could wrong, it happens often.
Good luck!
Respectfully,
jkelly