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Rifles, Reloading, Optics, Equipment
Reloading
Preferred Press for Precision Rifle?
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<blockquote data-quote="Pdyson" data-source="post: 2282186" data-attributes="member: 74061"><p>GavinTube the ultimate reloader did an interesting shootout on single stage presses and measured the results and made comparisons. What was most interesting to me was the 2 schools of thought around how to improve concentricity and TIR where some presses utilize tight tolerances for ram, shell holder, and die alignment; while others utilize wide tolerances to allow the die or shell holder to move during resizing and or bullet seating to allow the brass to "self-center" itself in the dies. Overall the most expensive highest precision press won…but not by much, there were self centering presses that came very close.</p><p> My 45 year old rock chucker is worn and I abused it using it as an automotive press more than once in the 80s. Even Worse is other than spraying WD-40 on it when it got crusty from primer residue, I have never disassembled and cleaned it until I upgraded the primer catcher 3-weeks ago. Even so, it makes very concentric ammo. Just as good as my brand new summit press which has even more wiggle in it. I'm doing great right? Well maybe I have over estimated the importance of concentric ammo.</p><p>I just watched a video of Erik Cortina (who reloads on a 750 Blue Press) where he says he NEVER measures the concentricity of his loaded rounds. He says concentric ammo is important, but not that critical. To prove it He went to a friends house after and F-class match and took his dirty competition rifle to the bench. After he measured 4-thou runout on his match ammo he loaded and shot a 5-shot one-hole, half MOA group from a dirty rifle. Same size group it shot during competition. My mind is blown!</p></blockquote><p></p>
[QUOTE="Pdyson, post: 2282186, member: 74061"] GavinTube the ultimate reloader did an interesting shootout on single stage presses and measured the results and made comparisons. What was most interesting to me was the 2 schools of thought around how to improve concentricity and TIR where some presses utilize tight tolerances for ram, shell holder, and die alignment; while others utilize wide tolerances to allow the die or shell holder to move during resizing and or bullet seating to allow the brass to “self-center” itself in the dies. Overall the most expensive highest precision press won…but not by much, there were self centering presses that came very close. My 45 year old rock chucker is worn and I abused it using it as an automotive press more than once in the 80s. Even Worse is other than spraying WD-40 on it when it got crusty from primer residue, I have never disassembled and cleaned it until I upgraded the primer catcher 3-weeks ago. Even so, it makes very concentric ammo. Just as good as my brand new summit press which has even more wiggle in it. I’m doing great right? Well maybe I have over estimated the importance of concentric ammo. I just watched a video of Erik Cortina (who reloads on a 750 Blue Press) where he says he NEVER measures the concentricity of his loaded rounds. He says concentric ammo is important, but not that critical. To prove it He went to a friends house after and F-class match and took his dirty competition rifle to the bench. After he measured 4-thou runout on his match ammo he loaded and shot a 5-shot one-hole, half MOA group from a dirty rifle. Same size group it shot during competition. My mind is blown! [/QUOTE]
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Preferred Press for Precision Rifle?
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