You haven't had to change bullet seating depth or anything after 50 rounds or so ?Mine is just under 700 rounds burned Retumbo in it for the first 200 rounds and H1000 for the next 500. Still shooting as good as the day I bought it. 26" proof Sendero Lite barrel. I will order another barrel after hunting season but will not change it until necessary because I am curious how far it will go.
N570 is hard on throats. Probably one of the worse powders for throat erosion and fire cracking.By the way I'm shooting 195 berger and N570
Once I had my loads dialed in after about 150 rounds I never chased the lands. Never needed to the accuracy never degraded. I am shooting a mono bullet out of it at 3,497 fps.You haven't had to change bullet seating depth or anything after 50 rounds or so ?