I'll be the odd duck--32-40, breech seated
Here lately I've been bitten by the schuetzen bug. It bit hard. It is challenging, beyond anything I've done before, and an amazingly accurate firearm/ammo combination when you get it right. In fact, that a cast bullet, 19th century firearm, with iron sights, designed for "shooting from your hind legs" can outshoot pretty much anything else I've shot, is a surprise. The tiny 1.5" 25 ring on the 200 yard target is challenging in and of itself.
For those unacquainted with the drill, with fixed ammunition, you load a complete cartridge at home, priming the case, adding the proper charge of powder, and seating a bullet. For breech seating, using relatively soft cast tapered bullets, you bring 1 (one) case, your cast bullets, primers, and powder measure with you to the range.
First you breech seat a bullet in the barrel using a breech seating tool. This device has a dummy cartridge of sorts within which a plunger reciprocates, and a lever at the rear to force the bullet into the throat of the barrel. The depth at which you seat the bullet makes a difference. Then one decaps his cartridge case, seats a new primer, charges the case from his powder measure, and then chambers the cartridge. In all it is about a 2 minute drill.
The benefits on accuracy, at least as compared to fixed ammunition in a properly throated schuetzen rifle, are demonstrable. I'm so taken by this experience that I'm contemplating selling my conventional firearms, and buying another schuetzen.
So in answer to the OP question, of all the shooting and reloading I have done through the years, I like loading for 32-40 best.