308win Load development

[moe africa]

Good day
All I've recently done load development on my 308win Prs rifle (with occasional F-tr)
Its 27" bbl
Im using 178gr ELD-Ms ,Vihtavuori N150 , lapua palma brass and Murom (I think wolf in the USA) primers
The first test was a rough charge test 43.5,44 and 44.5 gr at 20 , 40 and 60 thou jump
Thereafter I shot 43 , 43.5 and 44gr at touch (mistakenly touch ) at 300m (2.262" CBTO )
And I lastly shot 43.5gr at 10 thou at 293m ( the washed out target )
A note : the test at touch shot equivalent velocity of a charge .5gr higher
My question is where to go from here ?

 

[mgunderson]

Merry Christmas. Shot more than a little 308. They are tolerant to all sorts of things. I dislike the touching for competitions. My opinion, load some a 44 grains and shoot 5 shot groups at 300m. Change the seating depth from 15 off to 40 off in 5 thousandths increments 15,20,25,30,40 . Two of these will shoot better than the other. Powder charge is not likely to significantly change the seating depth. You can find several seating depths that shoot well between jam and 70 off the lands. Pick a flat but round group. A flat wide group can be problematic, but that is a little touch information.

How many rounds on the barrel and are you getting a sticky bolt?

 

[moe africa]

Merry Christmas. Shot more than a little 308. They are tolerant to all sorts of things. I dislike the touching for competitions. My opinion, load some a 44 grains and shoot 5 shot groups at 300m. Change the seating depth from 15 off to 40 off in 5 thousandths increments 15,20,25,30,40 . Two of these will shoot better than the other. Powder charge is not likely to significantly change the seating depth. You can find several seating depths that shoot well between jam and 70 off the lands. Pick a flat but round group. A flat wide group can be problematic, but that is a little touch information.

How many rounds on the barrel and are you getting a sticky bolt?

Hi Happy Holidays
The barrel has about 600 rounds
I tested 44gr(20,40,60l on the first image and at 300
43.5gr seemed to be better

 

[64Rambler]

at 300
43.5gr seemed to be better

Since you shoot at distance, take the 43.5 and play with +/- 0.003 and +/- 0.006" from whatever seating depth you used for the 300 yd target. You can also try +/- 0.1 and +/- 0.2 gn powder charge.