"I'm not used to flying straight at a target" plus the fact that the gunshots are in a perfect line, suggest that Scar is heading exactly
towards the target.
If Scar was moving elsewhere and was just rotated to keep the front pointed at its target, every gunshot would hit the target from a slightly different angle - the incoming gunshots would form an arc (although every shot would move in a straight line).
If you ever played a shooter game with some fast-firing projectile weapons, you know what I am talking about
keeping the nose towards the target while actually moving a different direction
Having nose differ from the moving direction actually happens every time you rotate your ship.
Keeping nose fixed at certain point in space might require some skill, but I am sure ship computers should be able to handle that, even if the said point is moving/accelerating.