300blackout with 150gr hornady fmj

[JeffreyDeGraff]

Do you guys seat to the cannelure , or to hornady’s recommended 2.220”?



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[CodySPowell]

Cannelures should never be used as a reference for seating depth. It's merely a mechanical bond securing the jacket to the core. Stick with the manufacturers recommendations for seating depth or adjust accordingly to what your rifle prefers.[emoji106]

Do you guys seat to the cannelure , or to hornady’s recommended 2.220”?



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[JeffreyDeGraff]

Cannelures should never be used as a reference for seating depth. It's merely a mechanical bond securing the jacket to the core. Stick with the manufacturers recommendations for seating depth or adjust accordingly to what your rifle prefers.[emoji106]

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I guess I should’ve asked, what OAL do you guys,that load this bullet, use?


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[CodySPowell]

You're going to get a bunch of different answers on that. I seat 50gr Zmax at 2.250, but that's what my gun likes. Others seat to 2.200. If you have any doubts or something looks off, double check your data.

I guess I should’ve asked, what OAL do you guys,that load this bullet, use?


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[CodySPowell]

I don't know what powder you're using, but I'd go with their load data. The Hornady book says 2.090 OAL for their 150gr fmj.

You're going to get a bunch of different answers on that. I seat 50gr Zmax at 2.250, but that's what my gun likes. Others seat to 2.200. If you have any doubts or something looks off, double check your data.

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