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RT1500 on a 450/550

Came by a 450. Thinking of setting it up as a dedicated .223 case trim station and freeing up a 650 from this chore. Is there room on the 4-hole 450 for the RT1500 and another die, a sizing/decapping die?

As there is little if any case length adjustment room for the RT1500/.223 on the 650, it may be better to upgrade the 450 to a 650 and use the cut-out shell plate.

Thoughts?

I meant upgrade the 450 to a 550

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