Re: Lee collet neck sizing die - 300RUM
I have no idea about the RUM part of your question but I do use a lee collet die and it produces very true ammo. As a matter of fact on most rounds I have less than .001 runout on the bullet. I did however notice that was not the case until i switched to the forester co-ax press...but that is a whole different thread....(but it was less than .002 on the RCBS)
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