Springer knot...heavy line only?

[Jim O]

I watched the video with Capt. John Collins demonstrating this knot, and I would like to know exactly why it's not recommended for line under say #80 test.  If you used it for #30-40 test, why would that be a problem?  The simplicity of the knot is what I like.  Some recommend adding a third wrap, but it's still a very simple knot.

[quang tran]

For small line there are many knots that strong but are too bulky to tie heavy line . This knot design to tie heavy line and create a smaller knot ,acceptable strong

[Jim O]

For small line there are many knots that strong but are too bulky to tie heavy line . This knot design to tie heavy line and create a smaller knot ,acceptable strong

I understand why it is used for heavy line. I want to understand why no one uses it for lighter (#30-40 test) line. 

[Keta]

Try it, they slip, I have no idea why but they do.  It is a interesting knot.