The problem with using the Hornady length kit is if your finding you ogive measurement and your case headspace is not known when you seat your bullet to the Hornady measurement and your case sized case has wiggle room , how accurate is your CBTO measurement. It will not be consistent. Finding your case headspace first , this measurement will not change but your ogive will from use. Benchrest shooters will check every 500 rounds or different lot # even with the same bullet. Can't go wrong with the closed bolt method , you can check it out on line. I found it very accurate for both datum and ogive measurements
PS: The problem with soft seating you bullet to find the lands is when the bullet comes in contact with the lands , the bullet will stick and pull slightly out of the case neck . I found seating with normal neck tension bullet seated long and testing in chamber , lowering the bullet in the press until you find your touch , from there you can set jump or jam . This is done with a sized , no primer or powder in the sized case and used as your dummy round for touch measurement.
PS: The problem with soft seating you bullet to find the lands is when the bullet comes in contact with the lands , the bullet will stick and pull slightly out of the case neck . I found seating with normal neck tension bullet seated long and testing in chamber , lowering the bullet in the press until you find your touch , from there you can set jump or jam . This is done with a sized , no primer or powder in the sized case and used as your dummy round for touch measurement.
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