Ok guys. For those following here’s this evenings shooting. I took 9 of the 12 Lapua cases that I have fired and loaded them working up because I know from past experience that I’ll need a little hotter load in Lapua. I was hoping that maybe this rifle just needed the brass fire formed and I think that is the case. I FL sized, trimmed, chamfered the brass and brushed the neck inside extremely well and then started at 46 grains which was the load the federal brass shot 1/4 MOA. Then I loaded 46.2 and 46.4. Here are the pics. The 46 shot a little over an inch vertical. The 46.2 shot about 1” vertical and the 46.4 shot about 1/2” vertical. I don’t know if I pulled that last shot low or not on the 46.4. Im betting not since the other groups were vertical. With the virgin brass I got just the ever so slightest cratering on the primer at 46.6 so I'm on the fence as to whether to try 46.5. I probably will because I think that will pull it all together. Maybe even 46.6. How bad is a little cratering anyways?
j/k. On the virgin 46.6 you could just barely feel where the pin strike was. So I’m not going to say I got a bad batch of Lapua brass because I love Lapua brass.
I’m just going to say this rifle likes fire formed brass.
. For reference that red sticker is 3/4”
Edit: I have to try some fire formed Lapua at 46.6. I think it will pull the group back together into sub 1/2 MOA. Which is good enough for me. This is a sub 500 yard deer rifle for me. I’m not even worried about ES and SD really. It won’t matter much that close as long as they group decent. Most shots will be under 300