I used to PD shoot with a guy that used a Dillon progressive to load his 223. He occasionally had a bad round, no powder, or other issues.
I’ve been loading since 1974 on a single stage rock checker. I’m currently loading about 20 rifle cartridges and five handgun. Works for me.
Same here dale. I also use a rockchucher. Never have an issue because I am very vigilant about making sure every case gets the correct charge. You mention 223, as that is one of the cartridges the op wants to load. On a single stage, I load 300 rounds/hr. That is precision quality ammo, not some of the garbage you buy at the stores these days...
That's ammo I run through my AR's^^^^ This is how it shot in the last AR match:
Iron sight AR:
So, while loading your own may take some time, it also has its benefits...