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Old January 10, 2013, 09:32 AM   #3
Marco Califo
Senior Member
 
Join Date: April 4, 2011
Location: LA
Posts: 802
Yes they are 7.62/308. The 243 is 308 necked down. There is a lot of variance in 7.62 brass, particularly with mil spec vrs commercial, when reloading it for 308. These variances will only multiply when used for loading 243 (same volume of expanding gas forced through a smaller bore). I concur with the previous post that you should not use it for 243 until you have experience with 243 using commercial brass. It may ultimately be usable later, but is not a safe learning component.
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