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Rifles, Reloading, Optics, Equipment
Reloading
to touch the lands or not to touch the lands
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<blockquote data-quote="Mikecr" data-source="post: 1040403" data-attributes="member: 1521"><p>Full seating testing(similar to Berger's recommended) has so far put my best seating off the lands(OTL) for small but hunting capacity cartridges/heavy bullets. I like this, as I don't have to maintain an in the land(ITL) relationship for accuracy to hold over time(with erosion).</p><p></p><p>As far as pressure, you back off a bit for ITL and work back up to the same pressure/MV.</p><p>And I've found it best to back off powder a good amount for seating testing, again as Berger recommends. I do the brunt of my seating testing while fireforming new brass at reduced load.</p><p>I do not do full seating testing with a hot load, near max load, or my best load. If I did testing there I'd be affecting too many things at once to tell my seating is actually primary to results.</p><p></p><p>ITL, or jammed(soft seating) is most useful for underbores relying on hi pressure nodes. These are small non-hunting cartridges. We don't have any problem getting plenty of pressure from large capacity cartridges running a lot of slow powder for heavy bullets. And large capacity cartridges are not viable for very high pressures due to all the chamber area pressure is applied to.</p><p>There are a lot of old timers out there that assume bullets should be started ITL. Many have insisted for years that Berger VLDs needed this to shoot. They were never right, and those of us who actually did valid seating testing saw it all along.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1040403, member: 1521"] Full seating testing(similar to Berger's recommended) has so far put my best seating off the lands(OTL) for small but hunting capacity cartridges/heavy bullets. I like this, as I don't have to maintain an in the land(ITL) relationship for accuracy to hold over time(with erosion). As far as pressure, you back off a bit for ITL and work back up to the same pressure/MV. And I've found it best to back off powder a good amount for seating testing, again as Berger recommends. I do the brunt of my seating testing while fireforming new brass at reduced load. I do not do full seating testing with a hot load, near max load, or my best load. If I did testing there I'd be affecting too many things at once to tell my seating is actually primary to results. ITL, or jammed(soft seating) is most useful for underbores relying on hi pressure nodes. These are small non-hunting cartridges. We don't have any problem getting plenty of pressure from large capacity cartridges running a lot of slow powder for heavy bullets. And large capacity cartridges are not viable for very high pressures due to all the chamber area pressure is applied to. There are a lot of old timers out there that assume bullets should be started ITL. Many have insisted for years that Berger VLDs needed this to shoot. They were never right, and those of us who actually did valid seating testing saw it all along. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
to touch the lands or not to touch the lands
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