Your velocities look good. What does the Standard Deviation (SD) and Extreme Spread (ES) look like. These figures will give you an idea how the cartridge will perform at long range, the lower the SD/ES numbers, the better the long range performance....usually. How are your 100 yard groups looking?
Lapua brass is fantastic stuff. Keep an eye on your case necks, with that many reloads on the case you may need to think about annealing the necks in the near future. If your charges aren't near max, try jamming bullets .010" to .015" to see if accuracy will improve. I've gotten good results jamming Bergers but so so results jamming Sierras.
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