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Just wrapping this thread up from my perspective. I did a bit of testing on my own 6.5x47 - Barnard action so not necessarily a good choice for showing pressure signs, but it is what it is. I pushed...

130-140gr bullets, loose primers: 75-77,000 PSI peak predicted.

A lighter bullet (100gr) and faster powder (BM2);
69.5kPSI - 71.9kPSI predicted peak pressures for the onset of sticky bolt lift.

A second load to consider, and if the information on this was more complete, I'd just report the predicted peak pressure along with the pressure signs as before. However that is not the case so here...

I'm not recommending that shooters disregard actual signs of deformation in their fired cases in favour of theoretically calculated pressure. I am however interested in whether the calculated peak...

Yes, no flattening-off of velocity increases with incremental increases in charge weight.

You know very well that in using the term "pressure signs" I am referring to dimensional changes in...

If this was true then it would be commonly known and accepted that load development with the 6.5x47 should be approached differently rather than looking for pressure signs. I have not seen velocities...

First up we have a sticky bolt lift at an estimated peak pressure of 72,700 PSI that does not occur when this is lowered to an estimated 71,300 PSI with no other pressure signs.

Although there is much to like about the 6.5x47, one aspect does concern me. Cases anecdotally do not show the same evidence of peak pressure that one might see in other designs - particularly large...