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Rifles, Reloading, Optics, Equipment
Reloading
Find seating depth or powder charge first on VLD's?
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<blockquote data-quote="Mikecr" data-source="post: 908919" data-attributes="member: 1521"><p>First, I have no idea why best seating is prerequisite to best grouping. I just know it is.</p><p></p><p>I've referred to seating adjustment as coarse tuning for illustration, but in reality seating adjustments are barely affecting tune. In fact a 'fine' seating adjustment in the end works to 'shape' grouping. And maybe this is why people see seating as a fine adjustment.</p><p></p><p>I treat it as coarse because it affects grouping by far more than powder adjustment. So much so, that if you're seated in a bad place, you'll miss best tune with powder. You just won't be able to see it, as bad seating position will mask best results from powder.</p><p>When you test for best seating with a method(like Berger's), you'll find good potential and pure ugly and good potential again and ugly again. Imagine at that point what ugly would do to any 300yd ladder. Would you really be able to spot powder nodes with bullets spraying all over hell?</p><p></p><p>There is also purpose seating, best be damned. This to reach the ultimate work-around in tune (high peak pressure). A competitor shooting a popular underbore(6PPC, 30br, 6.5x47L) must have this. They'll pick fastest powder, jammed, and or extreme neck tension to reach it, and tune with powder only, and shape grouping with fine seating tweaks.</p><p>But high pressure isn't viable in larger cartridges(hunting cartridges). So purpose seating doesn't apply to us hunters.</p><p>Don't try to guess best or 'starting' seating. Find it up front, log it, and stay with it.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 908919, member: 1521"] First, I have no idea why best seating is prerequisite to best grouping. I just know it is. I've referred to seating adjustment as coarse tuning for illustration, but in reality seating adjustments are barely affecting tune. In fact a 'fine' seating adjustment in the end works to 'shape' grouping. And maybe this is why people see seating as a fine adjustment. I treat it as coarse because it affects grouping by far more than powder adjustment. So much so, that if you're seated in a bad place, you'll miss best tune with powder. You just won't be able to see it, as bad seating position will mask best results from powder. When you test for best seating with a method(like Berger's), you'll find good potential and pure ugly and good potential again and ugly again. Imagine at that point what ugly would do to any 300yd ladder. Would you really be able to spot powder nodes with bullets spraying all over hell? There is also purpose seating, best be damned. This to reach the ultimate work-around in tune (high peak pressure). A competitor shooting a popular underbore(6PPC, 30br, 6.5x47L) must have this. They'll pick fastest powder, jammed, and or extreme neck tension to reach it, and tune with powder only, and shape grouping with fine seating tweaks. But high pressure isn't viable in larger cartridges(hunting cartridges). So purpose seating doesn't apply to us hunters. Don't try to guess best or 'starting' seating. Find it up front, log it, and stay with it. [/QUOTE]
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Reloading
Find seating depth or powder charge first on VLD's?
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