Cold bore or fouled barrel.

[Mtnwalker]

Well made to the range today to shoot a fouled cold bore to see how it grouped with the 5 other rounds.  It grouped very well.  at 200 it was within shooter error which was 1 inch right of point of aim. ES of 19 and SD of 7.1.  Not thrilled with that but not sure where it's coming from . Looking at a new scale maybe or trying to figure out how to hard reset my Chargemaster 1500.  Had it for 10 years so maybe I need to upgrade the scale.
speeds
1 2935
2 2952
3 2933
4 2946
5 2942
6 2950

That ES and SD are just fine if the rifle is grouping well.  An ES of 30 or less with SD in the single digits is pretty darn good.  👍

you are probably right but you know how that chasing your tail thing goes.  If I don't settle soon I will burn this barrel out haha.  Three different powders, two different primers and two different bullets.  I am going to shoot one more ladder and I give.  It is shooting very well.

Agreed, you're talking less than 3" of vertical dispersion at 1000 yards with your 19 ES. Unless you just enjoy tinkering

[Crunchy]

For those following the journey 
Ran a ladder  from low to high and then high to low after letting the barrel cool.  This was with a clean bore and took two foolers before starting.  Ive been shooting at 66.4 but now thinking maybe I should be at 67.1ish.

66.1  2928.   2933
66.4. 2929    2947
66.7. 2956.   2951
67.0. 2964.   2963
67.3. 2971.   2958
67.6. 2993.   2984

[Lowedog]

Hornady has several podcasts on the subject of group size.  You may already be aware of this...

[hunter399]

One of my rifles is doing it now.
You guys jinxed me or something.
Cold bore shot always in the bullseye,with two shot grouping together,to the left after.
I started with a clean barrel,first three shots group very well.
1 moa at 100. Then I adjusted the scope appropriately,cause it was a new load I was trying. Now it hits bullseye on the first cold bore shot,then two off to the left grouped together.
Only ten shots since cleaned.
Might just use the way it is. Or clean again,and see if it groups better clean. Not sure.
7mm mag.
175 grain Grand slam .