I don't have 20 loads, but do have over 10 in my Lapua 260 brass and it's still going strong. However, having said that, I have 8 loads with my Rem 260 brass, as well and it's also doing good! I use both and they have worked well for me! Shooting 42.5 grains of H-4350 with 142 SMK's and the 140 A Max in my 260.