45 acp dies

[ar15barrels]

I dunno about that. I use Lee's dies on several progressive presses, including the .45 ACP dies, and they work very well, also.

I didn't say that others would not work.
I said that Dillon are the best.

It's not just the radiused openings that make them better on progressive presses.
There are a bunch of other things like the spring loaded decapper that throws the primer off the decapping pin so it won't get drawn back into the primer pocket or the seating and crimping inserts that come out to clean out bullet lube and lead without having to unscrew the die or the multiple types of seating inserts so you can have the best match for your bullet shape without having to buy extra seating stems.
No other dies have all those features.
Not even the more expensive Redding dies linked above.

[smoothy8500]

Yeah, it's true that Dillon dies have a lot of innovative features to offset the sting of high price.

[ar15barrels]

Yeah, it's true that Dillon dies have a lot of innovative features to offset the sting of high price.

Dillon dies are less expensive than Redding.

[Paperchasin]

RCBS and most other dies are meant for single stage press use so they don't have the nice belled opening on each die that makes the Dillons so much nicer on a progresive press.

Can you elaborate more on this? I have been running an RCBS Pro 2000 with RCBS dies in both 9 and 45 for years without any issues. I am not shooting 10k rounds a year, but probably closer to 2-3K. It's probably been close to 10 years now, should I expect my dies to wear out and need replacing?

[ar15barrels]

should I expect my dies to wear out and need replacing?

No.
If they are working for you, you are fine.
A friend of mine loaded over 800k rounds on a set of carbide RCBS 38 super dies before the dies were worn out and no longer sized is cases enough to fit into his race gun.

If you were shooting 10k per year and loading lead bullets, you would probably appreciate dillon's dies more since you can take the seating and crimping inserts out to clean them without losing your die adjustment.

And then other little things like the decapper that pitches off crimped primers that get stuck on the end of the decapping pin and sometimes get drawn back into the case, jamming up the press.

The dillon dies also have more funnel on the bottom of the seater which self-aligns a bullet that is set as much as 60 degrees off of straight.
Try this with standard rcbs dies and you are likely to crunch a case.
Dillon dies are much more forgiving and don't crunch cases as easily.
You really have to set a bullet almost completely sideways before the dillon dies will crunch a case.