Last night I decided to load a few more shells for my .243. I already had all the case prep done so all I had to do was throw some powder and plug the case w/a 105 gr Amax. While I was letting my Lyman DPS warm up, I decided to use my Stoney Point OAL gauge to make sure my old seating depth was still OK. What I found concerns me a bit. A few months before, when I worked up this load, 2.285" OAL w/the SP gauge was .020" into the lands. Last night I got consecutive consistant readings of 2.290" to the lands!!!! I then adjusted my seating depth to 2.310", so it would still be .020" in. I had noticed the rifle was not shooting as well and I was getting much higher ESs and SDs than I used to. This was part of the reason I checked it. Is this normal to see this much erosion after 500 or so rounds? Thanks for the info, B.J.