I am just trying to make a level measuring field. If I start with my own brass, picked up from my range session, I ask myself how long it takes to turn 500 used cases into 500 ready-to shoot rounds.
Tumbling the fired cases clean is the same for either method, so I start the clock after sifting the tumbling media from the brass
Starting with primed cases cuts a lot of time from the batch process, but very little from continuous processing. The biggest savings of time between the two processes is that you don't have to remove and insert the cases from and into the shell holder so many times. Batch priming before starting either process gives the batch mode a generous handicap advantage.
By my observations of my own throughput, I can process 50-75 rounds per hour in batch and 120-150 per hour continuous on an auto-advancing turret, but that is using an automatic powder measure (for both methods) and not checking the throw weight once I have started, with either method.
If I measure each and every powder drop, the turret loses some advantage, but still retains an edge. I guesstimate 1:2.5 using the powder measure and 1:1.8 measuring every powder throw.
I am sorry that I don't have better figures, it has been a while since I clocked myself.
Now, if I were going to pull every case and measure the length and trim them, the continuous mode would lose another increment of advantage, for every time you add a removal-insertion cycle, it adds to the time of the continuous process, but adds nothing (in the differential sense) to the time of the batch process.
But, just doing 500 straight-walled pistol cases and automatic powder measure, 1) with a single-stage press, size and deprime, reprime, bell and charge, seat bullet and then crimp and box up, I estimate around 7-8 hours. Continuous processing on my Lee Classic Turret I estimate 500 rounds through the same steps in 3 to 3.5 hours. That includes keeping the powder measure and primer feed full.
The batch processing does have the advantage of being able to stick 50 or 100 cases in a loading block and shine a light into all 50 cases at once to check for (gross) uniformity of powder charge. An added safety factor not to be ignored.
Time efficiency is not the only measure to be watched and cultivated, though it is the easiest I know of to measure.
Lost Sheep