Ruger rebored from a 280 to 9.3. First 6 rounds through the gun.
P64 300 Wby to a 375 Imp
M70 SS Classic 30-06 to 338-06
M700 SS Classic 338 Win to 35 Newton
Overall I’ve had a few and I tend to put 50 rounds through them cleaning to steel about every 10 and have had pretty good luck with them shooting well.
DF’s description of them is about spot on.