HI All ,
I believe the only way to improve follow thru is by adhering to the basics ...
Get your best footing and POSITION , footing is your natural point of aim .
The rifle in question MUST fit you as best it can ... OR modify it , a MUST .
DRY fire as often as possible , and pick a small point to aim at ...
DO not lie to yourself and constantly check your natural point of aim !
GOOD luck AND good shooting !