Hello guys,
got me a new Bergara B14 Wilderness Sierra for hunting in .270 Winchester.
I´ve tried some bullets but the groups weren´t good in the beginning.
I stuck with the Nosler 150gr. BT, which seemed to have the best precision potential.
Made a ladder test and found a plateau close to the maximum powder load (what Quickload said).
Primers and brass still looking good, I began to vary the OAL.
From 6 loads with different OALs (each 5 rounds), I had two loads spreading evenly horizontal and vertical at about 1.2"ish.
4 loads had only a vertical spread of around 0.4", but still a horizontal spread of round about 1.2".
I don´t now where, but in a book or in the internet I´ve read, that a horizontal spread can be caused by a too stout load.
Can somebody confirm this, or is this nonsense?