Why is Cframe script moving very slow? Moving blocky and slow.

Howdy,

So I am using this script and for some reason, the Cframe likes to move very slow and blocky looking. Is there any way to fix this?

Thanks,

Anthony

model = game.Workspace.Map.MapLeft

for i = 0, 38, 0.2 do
model:SetPrimaryPartCFrame(model:GetPrimaryPartCFrame() + Vector3.new(0,-0.3,0))
wait()
end