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Rifles, Reloading, Optics, Equipment
Reloading
Neck Sizing
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<blockquote data-quote="Bart B" data-source="post: 829920" data-attributes="member: 5302"><p>Good point.</p><p></p><p>In my experience, this was a headache; getting full length sized case headspace controlled to a small tolerance. It varies depending on the spring of the press, how long the ram's held at the top of its stroke with the case full into the die as well as the amount/type of case lube used on the cleaned cases. I tried several cures, but only the one below worked consistangly for me.</p><p></p><p>I've got the smallest spread in sized case headspace on a RCBS Rockchucker using a 50/50 mix of STP engine oil treatment and Hoppe's No. 9 bore cleaner. After fired cases are decapped and cleaned, they're tumbled in a Thumbler's Tumbler in a foam lined coffee can with a few drops of the homemade lube sprinkled around. Tumbling 40 cases them for as long as it takes to full length size them puts on a pretty uniform amount of case lube. Sized case headspace is typically under .002"; enough for excellent accuracy and case life. </p><p></p><p>I think if one uses the right Redding competition shell holder of the right heighe, then set the sizing die such that the shell holder just bumped it, sized case headspace could be more precicely controlled. It is when I set my dies that way, but the sized case headspace is much more than .001" to .002" less than fired case headspace and accuracy suffers.</p></blockquote><p></p>
[QUOTE="Bart B, post: 829920, member: 5302"] Good point. In my experience, this was a headache; getting full length sized case headspace controlled to a small tolerance. It varies depending on the spring of the press, how long the ram's held at the top of its stroke with the case full into the die as well as the amount/type of case lube used on the cleaned cases. I tried several cures, but only the one below worked consistangly for me. I've got the smallest spread in sized case headspace on a RCBS Rockchucker using a 50/50 mix of STP engine oil treatment and Hoppe's No. 9 bore cleaner. After fired cases are decapped and cleaned, they're tumbled in a Thumbler's Tumbler in a foam lined coffee can with a few drops of the homemade lube sprinkled around. Tumbling 40 cases them for as long as it takes to full length size them puts on a pretty uniform amount of case lube. Sized case headspace is typically under .002"; enough for excellent accuracy and case life. I think if one uses the right Redding competition shell holder of the right heighe, then set the sizing die such that the shell holder just bumped it, sized case headspace could be more precicely controlled. It is when I set my dies that way, but the sized case headspace is much more than .001" to .002" less than fired case headspace and accuracy suffers. [/QUOTE]
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