Home Forums Reloading Big Game Rifles Would switching my brand/type of dies help me?

This target tells me the first 3 cold bore shots are in the pressure node for a nice triangle group.

Because pressure and velocity slightly increase when warmer the two consecutive targets tell me you are right at the top of a node cold bore hence the vertical stringing begins and then slightly increases on target 3 when temperature and pressure go just above the node causing vertical stringing.

Group 4 screams no AO on the scope increasing the chance of error as far as shooter form or weather such as wind or the Sun causing mirage or both. It has to be because target 1-3 say bedding is a non issue. 9 rounds fired is a respectable sample size with no obvious fliers yet an obvious stringing pattern.

I'd drop the load in .1 gr increments and see if group 2 and 3 lighten up on the vertical string.

Shod