Thread: 7mm load data and thoughts

Originally Posted by distant stalker

I have found a few different causes for marks on cases, sometimes relates to sizing, remnant oil in chamber, varied seating depth etc. was brass used in ladder and brass used in more recent shooting from same sizing régime?

Hmm you raise a good point.
For the ladder test they were unfired cases. When I group tested the load one group was once fired and the other was new brass. That was mainly to see the difference in group size.
Yesterdays six were unfired cases.
Some cases were not quite bumped back enough, which is causing a touch of tightness on bolt closing.

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