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Nathan · February 29, 2020, 10:17 PM

Thos3 have you that haven’t loaded 300 bo, may not have the same issues. 300 bo has more neck thickness variation due to the number of converted brass in use, I think.

In addition, light 30 cal bullets are pretty flat base.

I had to just kiss the case mouth with my Lee expander die to get bullets to start. No further trouble after that!

February 29, 2020, 10:17 PM	#20
Nathan Senior Member Join Date: July 1, 2001 Posts: 6,325	Thos3 have you that haven’t loaded 300 bo, may not have the same issues. 300 bo has more neck thickness variation due to the number of converted brass in use, I think. In addition, light 30 cal bullets are pretty flat base. I had to just kiss the case mouth with my Lee expander die to get bullets to start. No further trouble after that!