I claim ignorance with Doubles but you must be careful with older bolt rifles in assuming that the same velocity equals the same pressure. Obviously this is related to the specific burn qualities of the powder but you must quantify.

Had a bud freeze the bolt of an older rifle with a different powder when the chrono gave the same velocity.

I would suggest that even in Double it would be nice to know a max load(a psi measurement for uniformity) to avoid when trying to regulate for various bullet/powder combos.

What pressures can a modern Double tolerate regularly and still regulate shots properly?