300 blackout and Lee resizing dies neck tension.

[Wes Sage]

Even .305 is just fine. The bullet needs neck tension. If you are loading the 150gr FMJ/BT, it will seat just fine and will go in with pressure.
Those gauges are a bit tough to use, and aren't accurate unless you chamfer the case mouth first.
Seat a few and see what it feels like

[Sampson1]

I just reloaded about 200 300 AAC. I used Lee Dies. The Neck Tension was tight, I didn't measure it, but the 110 Gr Varmegeddons seated with no issues. Cycled thru my Son's 300 and fired and ejected, no issues.

[JeffreyDeGraff]

Even .305 is just fine. The bullet needs neck tension. If you are loading the 150gr FMJ/BT, it will seat just fine and will go in with pressure.
Those gauges are a bit tough to use, and aren't accurate unless you chamfer the case mouth first.
Seat a few and see what it feels like

That’s what I was thinking. .305 is just about perfect, but the die that only sizes to .308, doesn’t seem like enough to me.


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[Guns4545]

Thanks Jeff as well. Seems correct to me. I'll seat some to see how they feel.

That’s what I was thinking. .305 is just about perfect, but the die that only sizes to .308, doesn’t seem like enough to me.


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[Guns4545]

Gotcha Wes. Thanks for the help.

Even .305 is just fine. The bullet needs neck tension. If you are loading the 150gr FMJ/BT, it will seat just fine and will go in with pressure.
Those gauges are a bit tough to use, and aren't accurate unless you chamfer the case mouth first.
Seat a few and see what it feels like

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