Effortless .308 Brass Processing with the DA3000 – Ultimate Reloader


Case preparation can take forever and you’re lucky if you find this monotonous process particularly fun. We’re automating it with the Dillon DA3000 and CP2000!


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Automated Brass Prep

Our beloved .308 Shorty got a new set of “clothes,” now sporting an Ultradyne UD3 chassis. To test it out, we needed to reload some more ammo (.308 subsonic and tracers), starting with prepping .308 military brass. Our DA3000 and CP2000 were set up to convert .223 to .300 blackout, so we had to start by adjusting the machine.

Removing the RT-1500 .300 BLK die

I retained the special toolhead with lowered step so I could get the RT-1500 low enough to trim cases, though I did have to remove it and the dies during set-up.

I swapped the trimmer I had installed with another RT1500, complete with trimming die.

Installing the .308 Shellplate

I also had to convert the CP2000 to .308 with a caliber conversion kit, add an RCBS small base resizing die, and swap out the small primer pocket swaging rod for the large one.

Removing the Small Swage Rod

When all together, case insertion claimed station 1 and a RCBS small base sizing die took station 2. I removed the rod from the mandrel die I used during .223 to .300 blackout conversion, repurposing the die as a hold down station over swaging in #3. (I added this after noticing flex in the shellplate.) I incrementally adjusted the trimmer in station 4 until I achieved the SAAMI spec length (2.000”).

Dialing in the Trimming Distance of the RT-1500 Trimmer

Another mandrel in the last station opened up the case neck.

I also took some time to verify my .209” pin gauge fit properly in the swaged primer pockets.

It did, ensuring my full-auto-fired brass were in good shape for their new life. After lubing cases with lanolin, I dumped them into the case feed bowl.

I dropped the prepped cases in an RCBS chamber gauge (cut to SAAMI-spec) to ensure they would chamber. All passed.


Stay tuned for part two of this series, focusing on loading subsonic .308 and tracers!

Get the Gear

Dillon DA 3000 

Dillon CP 2000

Dillon RT-1500 Case Trimmer

Dillon Rapid Trim Sizer / Trim Die

CP-2000 caliber conversion kit

Ultradyne UD3 Chassis

RCBS .308 Small Base Sizing Die at Midsouth Shooters Supply

RCBS .308 Chamber Gauge at Midsouth Shooters Supply

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Gavin Gear

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