12-11-2023, 04:58 AM
There's another thing that could be at the root of this. A completely stock, squared-off ejector head can cause those marks as the case is being dragged out/rotated after firing. There are some threads on this at various times on the forum here. Many guys have taken to rounding off or beveling that ejector head, so the friction/dragging doesn't affect that bottom case surface. I did a few myself and it helped. I think though, for my others, I haven't got around to it yet.
Now I don't know what the load data is for shooter's world match (smp? right) but you may want to try some low to medium loads with some known grendel powder, to see if the marks still appear. If it is due to the square ejector face, then you'll get same marks with that powder as well.
One other tip may help if you want to go there, is to cut off 1, 1.5 or at most 2 coils from the ejector spring. Again, I tried that once and it helped too. Just don't cut off too many, you can't put them back lol.
Now I don't know what the load data is for shooter's world match (smp? right) but you may want to try some low to medium loads with some known grendel powder, to see if the marks still appear. If it is due to the square ejector face, then you'll get same marks with that powder as well.
One other tip may help if you want to go there, is to cut off 1, 1.5 or at most 2 coils from the ejector spring. Again, I tried that once and it helped too. Just don't cut off too many, you can't put them back lol.
"Down the floor, out the door, Go Brandon Go!!!!!"