IMO reloading 9 mm is a waste of time unless you are reloaing huge amounts and if you are the SD is not the right press. I could see the SD for expensive rounds like .357, 10 mm, .44 or .45 Colt NOT for .38, 9 mm, .40 or 45 acp. YMMV.
I reload for several calibers where reloading is the only realistic option(i.e. 32-20) or at least the only affordable option(44 magnum).
I also reload a LOT for 38 special-far more than I do for any other caliber.
Around here, when it's in stock, the going rate for factory 38 special is around $20-22 a box(this is up from the $18-20 I was paying pre-panic). This works out to a cost of $.40 to $.44 per round.
I use a lot of the Xtreme 158gr plated bullets, which run right at $.10 each. Primers are running $.04 each now, and using Unique powder at a cost of around $25/lb, the cost is $.02 per round for powder(my actual cost is lower, but I rounded off to make the math easier). Using a powder like Bullseye gets things down to closer to $.01 per round. I consider the brass free, since all of mine came from factory ammo already bought and effectively lasts forever.
That give me a cost of $.16 per round for 38 special, or $8 per box of 50. I've bought cast bullets as cheap as $.06 each, and using Bullseye can get my cost down to $.11 per loaded round, but I'll go with the $.16 cost.
$8 per 50 represents a savings of $12 per 50 vs current market prices. Using a "bare minimum" of $200 worth of equipment(what I started with), the break even point for 38 special is after about 17 boxes, or 850 rounds. Even looking at $600 spent on a Dillon or other high end press, the break even point is around 2500 rounds.
Looking at the math for 9mm, Xtreme has 115gr plated bullets for around $.085 each. Primer costs are the same(although you might get lucky now and find them for $.035 or even $.03 each), and using Unique powder you'll be in the range of about $.025 per round. That puts us to $.15 per round, or around $7.50 per box. Assuming $15/box for factory, that means that your break-even point using the "bare minimum" equipment is around 1350 rounds, and on $600 of equipment will be 4000 rounds.
For me, even if I only loaded 38 special, reloading would still be a no-brainer. Of course, other calibers like .44 magnum(where I save about $30 a box) and 32-20(where I save $35 a box) are icing on the cake.