personal_aviator
Regular
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- Onterrible
So I made my first loads for my Savage today to see what would give a good group. I loaded 6 groups of 5 rounds each going by the book I have (Sierra). Shots are all 5 shot groups at 100 yards from the prone position (first time prone with this rifle), off a bipod, with a rear rest, slightly up hill shots. Conditions were calm winds, apx 24c. The rifle had only 20 rounds throught the pipe previous to today. I don't have a tape measure handy so I can't measure the groups right now.
The specs are:
Rifle: Savage 110BA
Brass: Lapua (once fired), body sized, and neck sized.
Bullet: Sierra 250gr HPBT Match
Primer: CCI 250 LR
COAL: 3.681
I used 3.681 because that's what the book says. I have yet to find out where the lands are. I have to make a dummy round friday but I want to narrow down the group before I start playing with COAL. As you will see in the pictures I think I should focus on groups 3 and 4 and load up another batch breaking down the spread between the groups.
Pressure signs: After shooting group 5 I noticed very slight cratering in the primers. This was also evident in group 6 but was not any worse than the cratering in group 5. There was no noticable change in the force to lift the bolt from groups 5 and 6 from any other group shot (they all felt the same).
I am most currious about the vertical dispersion versus the horizontal dispersion in group 4.
I'm new to this whole precision thing and am trying to learn. I have some US869 as well but am having trouble finding load data for it with 250gr slugs. I plan on getting some 300SMK's soon since I hear people have been having good luck with them with the 1 in 9 twist.
Thanks!
The specs are:
Rifle: Savage 110BA
Brass: Lapua (once fired), body sized, and neck sized.
Bullet: Sierra 250gr HPBT Match
Primer: CCI 250 LR
COAL: 3.681
I used 3.681 because that's what the book says. I have yet to find out where the lands are. I have to make a dummy round friday but I want to narrow down the group before I start playing with COAL. As you will see in the pictures I think I should focus on groups 3 and 4 and load up another batch breaking down the spread between the groups.
Pressure signs: After shooting group 5 I noticed very slight cratering in the primers. This was also evident in group 6 but was not any worse than the cratering in group 5. There was no noticable change in the force to lift the bolt from groups 5 and 6 from any other group shot (they all felt the same).
I am most currious about the vertical dispersion versus the horizontal dispersion in group 4.
I'm new to this whole precision thing and am trying to learn. I have some US869 as well but am having trouble finding load data for it with 250gr slugs. I plan on getting some 300SMK's soon since I hear people have been having good luck with them with the 1 in 9 twist.
Thanks!

