Time to continue load development with my .44-77.

[Kurt]

Jim,

Actually both targets look good when you get them in a cluster like that despite the 3" vertical.
I took loads that are less consistent to matches.

I usually get verticals when I start the range session using the same bullet and loads. I call it settling in.
The horizontal when the wind is down I think it comes from not a consistent grip or pull in the shoulder.

I don't like to admit it but when I get verticals it comes from pushing into the buttplate. I caught myself doing this with one of my rifles that has a weak hammer blow that gives a light primer strike and a misfire.
For me the push disappears after a few rounds fired and the verticals are oblique for me right to left and that I call settling in.

Don't get me wrongs I'm not saying that you do this, it's just my problem. I think that started from shooting those heavy 700 gr plus bullets behind 115 grains of powder shooting Calamity the .50-90