223 Rem – 75gr Hornady BTHP with AR-Comp

I’m testing the 75gr Hornady BTHP with Cannelure using AR-Comp. We’ve got a known-good charge, so I want to test seating depth in this video.
I also make a custom seating stem for my Lee seating die and run into some strange concentricity issues.

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Johnny's Reloading Bench

An idiot and his reloading press

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