Thread: Over pressure signs when there wasnt any before

Greetings @Vandros,
Primer appearance has been continously debunked as a reliable means of guessing pressure. There are just too many variables to lead you astray. Much more useful is velocity and I test each new lot of powder, for velocity, against the last pror to loading with it. Usually there will be a small difference but sometimes a larger one and rarely a much larger one so don't do this with a full load and make sure that your loads are identicals except for the powder and shot in the same session. Your load is max under the Hodgdon data but this has been dialled back considerably over recent years in the 7mm Rem Mag to allow for pressure variations. Much more likely IMHO is that the difference yoy noted is due to slightly more headspace. You don't asy how you are setting and measuring your shoulder bump but a lot of methods for case sizing to achieve this can have different results each time you set them up. Belted cases need careful sizing to fit the chamber as they mostly do not headspace on the belt.
In short stop worrying about primer appearance but do check velocity with new batches of loads and definitely do not ignore an ejector stamp or rub mark. The latter needs an immediate reduction in load.
Regards Grandpamac.