Is there a better method for getting info about the mouse?

So in the past I've always just used mouse.Hit.p with "mouse" being gotten through :GetMouse() and have never had issues before. As of late though I've found myself having some odd issues where if I were to do something like fire a projectile or the like, the projectile would veer off to the left or right by a stud or two. It's especially bad when aiming at anything with a rounded or angled surface. It just seems to have a habit of occasionally registering the mouse a bit off from where it's actually pointing.

After digging around the method I'm using now is the only one I could actually find on things like forums and other issues so are there any other alternate, more precise options, or am I stuck with the slightly wonky detection? I'm also hoping to find a better alternative as there has been discussion of potentially deprecating the old mouse object after some people have been having other issues such as the mouse just altogether not connecting.

I think this might work. Insert a LocalScript into a tool and put this:

tool = script.Parent
handle = tool:WaitForChid("Handle")

tool.Equipped:Connect(function(m)
-- m is the player mouse
end)