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Here is a photo I took today while retesting my data and changing some things slightly. I used 3 dummy cases. All trimmed to 2.090. Used a dremel cutting wheel to slice down through the necks to give enough tension to hold the bullet, but not enough to really jam the bullets into the lands. The idea is to allow the lands to push the bullet into the case with little resistance. Carefully extract the case and measure them.
Then I took and measured each type of bullet until I had 3 of each that were the exact same length. Then did my bolt close test.
The sierra Game king 130 grain came out to 2.762-2.764 COAL for all 3 dummy rounds after closing the bolt on them.
The Nosler BT solid base came out to 2.775-2.776 for all 3 dummy rounds after closing the bolt on them. At these measurements I colored the bullet with a blue marker and reinserted them into the chamber and closed the bolt. On all bullets I had clear lands marks. (dry erase marker) So I set my seater .030 deeper and tested again. This time no marks.
With both bullets the final COAL length with the compressed loads of H-1000 were about .005 longer than the non compressed Magpro loads. Finished lengths were 2.744 and 2.750 for the nosler BT solid base. The length for the Sierra 130 grain game kings were 2.730 for magpro and 2.733 for the compressed load of H-1000.
The COAL measurement for the Photo was 2.764.
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