FT is generally shot with even more specialised guns and much larger scopes.
Adjusting the scope is permitted so large magnifications are used to range-find the target precisely then a smaller magnification used to take the shot.
Targets are generic metal plates rather than quarry-shaped.
Sitting on a beanbag is a normal shooting position for FT but not allowed in HFT.
Maximum distance is 55 yards rather than 45.
Shots are taken from within a 'gate' rather than from in contact with a peg.
Scoring is 1 for knockdown else zero.
Anything I've forgotten.....