What is the best way to create bullets without lagging the server?

Note: I am using filtering enabled so the script runs on the server.

I've noticed when creating bullet projectile scripts that as I increase the number of players shooting that the lag created from these projectiles abnormally increases (almost exponentially?). I know that another possibility besides my bodyForce script is to use interpolation and repeated raycasting but is this the best way to go about doing it? This is my current script:

function _M.CreateBullet(weapon, pos)
	local basePos = weapon.Barrel.CFrame.p--:toWorldSpace(CFrame.new(0,weapon.Barrel.Size.Z*0,0)).p;
	local direction = (basePos - pos.p).unit;
	
	local bullet = Instance.new("Part");
	bullet.Name = "Bullet"
	bullet.Transparency = 0;
	bullet.Size = Vector3.new(0.2, 0.2, 2.6);
	bullet.CanCollide = true
	bullet.CFrame = CFrame.new(basePos, basePos + direction); --make only one end come out of barrel
	bullet.Velocity = -1*(direction * 5);--bullet.CFrame:toWorldSpace(CFrame.new(0,0,1)).p;
	--bullet.Position = basePos;
	--bullet.Anchored = true;
	local BF = Instance.new("BodyForce")
	BF.force = Vector3.new(0, bullet:GetMass() * (game.Workspace.Gravity - 0), 0)
	BF.Parent = bullet			
	bullet.Parent = game.Workspace.Bullets;
	
			
	spawn(function()
		bullet.Touched:connect(function() print("touched") bullet:Destroy() end);					
		while (bullet.Position - basePos).magnitude < 500 do
			game:GetService('RunService').Heartbeat:wait();
		end
		bullet:Destroy()
	end);	
end

I happened to see this on twitter and was very curious on how he did it. Anyone know how he successfully created that many moving projectiles at once? https://twitter.com/Silenxed/status/881224824047243264

You should use a BodyForce. Put the Force value to where you want the bullet to go, and multiply the numbers to make it go faster. Make sure to add force to the Y value to make sure it stays up.