Either of those is of course a wonderful hunting load, from a precision perspective, and now I have a lot of information about where the zero for the 55gr is, and a really accurate average speed to use for ballistics.
On pressure: I think if there is concern about the safety of the data due to uncertainty or variation, then a single shot ladder at reasonable charge weight spacings (e.g. 1gr) shot for a rough idea of velocity and pressure should help inform the loader, then follow up with a 10rd group at the charge weight area selected to give the required velocity to establish an idea of precision and a good average velocity.
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