I had to redo the front end of the target holder/back stop due to massive sand leakage.
I retrieved these from the sand.
My problem is that any groups under 1" at the back stop (200 yds) the third shot of a three shot group with either the 338 RUM or 270 AM completely penetrates and dusts on the lava rock I have stacked against the rear of the back stop. That's pretty much of a bummer as I will have to fill the lava rock w/sand also.
These bullets have penetrated 3/4" plywood backed by another 1/2" plywood then 8" of good old Idaho blow sand. Really fine stuff.
Penetration is usually around 4 to 6" of the sand depending on which shot it is.