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I wonder about a cordite round that produced 40,000
psi 'at home' then fired in rifle which was originally regulated in Merry old damp England, but after being carried in "the front of a shirt pocket" or ctg. loop was then thrust into a blued/blacked rifle that had been carried in the 120F heat under a blazing sun, barrels so hot they couldn't be touched, let alone held.

How much pressure did that cordite loaded round produce?

Did anything happen to the regulation, so painstakenly adjusted for bullet weight, pressure, velocity and recoil at 60F - maybe 70F or perhaps 55F or even colder - what time of year were the barrels regulated? - how did that round so carefully regulated shoot, after being bounced up in pressure an incredible amount by the heat of the sun and sitting in the tubes (or even freshout of the pocket - almost instantly taking on the temp of the tubes) - how did it shoot, accuracy wise?

Care to guess how much pressure those guns are actually handling or have handled, shot after shot?

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Daryl,
I just realised that you had asked these questions which had not yet been answered.
The thing is of course, that the British were well aware a long time back, of all the things you mention concerning pressure and regulation issues.
Quite a few books have been written about what was done regarding pressure increases and the consequent changes in regulation for Brit ammo when used in the tropics.
You'll find the answer to your questions in Taylor's "African Rifles and Cartridges", and Burrard also covers it in "Notes on Sporting Rifles". I've seen other books which have mentioned it too.
Burrard's book was first published way back in the 1920's, which demonstrates that they were "onto it" a long long time ago.