Couple of things. With the A5 FSD you can go 150 ly without refuelling, so why risk scooping interdictions and heat damage from that. And wasted time
If you dump your shields and choose cargo instead you can cram in 128t, and therefore make 1.8 million per trip
Cause i want some fun - i want to be interdicted and to interdict sometimes and I dont want to pay for fuel - the time for scooping is used to get the new nav point...
You are talking about most profit and efficiency. That was what i did before and my fun went to 0. I did it to grind for the asp and its upgrades and thats ok.
Btw if someone is searching for a stable inner system route with stations 3Ls aways from each other and ~1000-1200cr./t profit each way go for Nima Rushword Terminal (Beryllium or Gallite) and Burbank Orbital (Superconductors) - did that one really really often ^^ ;-) 6 Minutes per run ~270k-300k Cr. with an 128t asp - thats >2.7 millions an hour while watching a tv show on the second screen