SetNetworkOwner adding a gravity effect?

function fire(vTarget)

    local vCharacter = Tool.Parent;

    if vHandle == nil then
        print("Handle not found")
        return 
    end
    local dir = HRT.CFrame.lookVector
    --dir = computeDirection(dir)

    local missile = Rocket:clone()

    local pos = HRT.Position + (dir * 5)
    local EggY = HRT.Orientation.Y
    missile.Position = pos
    missile.CFrame = CFrame.new(pos,  pos + dir)
    missile.Orientation = Vector3.new(0, EggY, 0)

    local bodyForce = Instance.new('BodyForce', Rocket)
    bodyForce.Name = 'Antigravity'
    bodyForce.force = Vector3.new(0, Rocket:GetMass(), 0)

    local vPlayer = game.Players:playerFromCharacter(vCharacter)

    if vPlayer == nil then
        print("Player not found")
    else

    end

    missile.RocketScript.Disabled = false

    missile.Parent = game.Workspace

    missile:SetNetworkOwner(vPlayer)

    local CreatorTag = missile.CreatorTag
    vPlayer = CreatorTag.Value

    SpawnPart.ParticleEmitter.Rate = (200)
    wait(0.01)
    SpawnPart.ParticleEmitter.Rate = (0)    


end

The script above is for a rocket launcher in my game that had issues with the rocket not flying smoothly. I found out it was because of the Network Owner issue. So I added the SetNetworkOwner line at 36 and it flies perfectly smoothly now. However, after adding that line, the rocket seems to have gravity. I have no idea how changing the Network Owner could affect the rocket's actual flight, but it doesn't fly straight anymore. It falls as it flies, like gravity now applies to it, which didn't happen before. Any ideas?