Thread: Case spinning when converting .223 to .300 blackout w/ Dillon RT1500

I'm setting up to convert some .223 to .300 blackout on a Dillon 650 with RT1500 trimmer and Dillon carbide trim die.
I'm am having trouble with the case spinning when it first engages the trimming head right before it starts getting tight in the resizing die.

Has anyone else using the RT1500 trimmer experienced this?

Did you do anything to stop the spinning or just continue as is?

I've heard this is why GSI uses a 2 die conversion process. 1st die is a rough cut, 2nd is a final trim. I used them with good success. I also did a few cases straight from 223 to 300 BLK with good.success though.

My best guess would be to spin the die down a little lower to see if it will engage the case sooner and then back the trimmer up to account for that.

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