Another Dillon 550 user here. I load three different calibers; .40 S&W with a Dillon factory die set, 9mm with RCPS dies, and .30 carbine with Redding dies. Only the Dillon Square Deal press uses proprietary dies, the other Dillon presses use standard dies sets.

In contrast to old Rogers comments, I can easily load 400+ rounds an hour of handgun ammo from start up to clean up with my setup. My typical loading session is for about 3 or 4 hours once a month or so. Even changing from .40 to 9mm only takes about 7 or 8 minutes, though going to or from .30 carbine takes about 15 minutes to make the appropriate changes.

When I was first looking to getting into reloading over a decade ago the main advice I got was if you like to tinker get a Lee, if you want to turn out ammo get a Dillon. Can't say firsthand if that's a fair assessment of a Lee, but I can say I don't have to tinker with my Dillon.

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