How does bullet setback from rechambering rounds factor into EDC ammo life cycle? Lots of discussion on that, e.g.
here.
I've recently switched from carrying Federal 9BPLE @ $0.40 /round to Federal P9HST3 @ $0.62 /round. With the 9BPLEs, I'd rotate the chambered rounds down farther into the magazine in the pistol when unloading/reloading for dry fire practice, to minimize the number of times I re-chamber the round. Then I'd shoot up the 15 round G19 mag on my first drills at the range, which happened about twice a week. With the cost of my EDC ammo now up by 50%, I'm rethinking that practice.
ToddG's point in the long discussion I referenced above, to the effect that shooting the one chambered EDC round at the range is an insignificant part of the total cost of ownership (range fees, practice ammo, transportation, etc), is well put. Now I'm thinking that with soft rechambering (lock slide back, insert round, ease slide forward and press closed), I will just rechamber the same top round a few times between range trips and then shoot it on the first drill. I'll check the cartridge height on the soft-rechambered round using a straight edge comparison to some new rounds, at least a few times, to convince myself first-hand that this practice isn't leading to risking a KaBoom. One box of EDC ammo per 50 range trips is a small slice of the pie. Plus, this strategy keeps the EDC ammo from getting too old, with a low cost of one round per range trip.
***EDIT: Subject should have read "Wear and tear from rechambering EDC ammo".