Load for the bullet weight. Who made it doesn't matter.
Hodgdon's 125 grain data is close enough. One grain won't matter.
"...mixed brass..." Make sure they're all the same length. Pistol brass doesn't require trimming often, but it can sometimes be different between manufacturers. Different lengths can cause OAL and crimping issues.
Your vernier calipres can be set up(locked) to become a case length guage.
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