Why do you reckon your .458 WM CZ "stopped shooting" ? Was it lead fouling ? There are ways to handle that if it is a factor, with a .459" bullet in .459" groove.
Ron aka "Rip" for Riflecrank Internationale Permanente NRA Life Benefactor and Beneficiary .458 Winchester Magnum, Magnanimous in Victory THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.