Technology has pretty much upped the game since my days where adjusting fire was an art. With GPS and the ability to fix direction accurately, at both the gun and OP, you are pretty much left with met and the round's CEP as the variables. We've upped the game on met as well and the M777 narrows the CEP. That's good enough for hitting area targets on a first round but not a point target. That still needs a munition with some type of terminal guidance which eliminates all met and CEP issues.
I can't speak for how much terminally guided munitions Canada has in its inventory, but they are widely available and getting considerably cheaper.