Yes it has , I've tried Bill Calfees reamer designs , which work but are or seem to be more ammo specific . When chambering a rifle , it needs to be determined what the owner is actually being used for . If most of his shooting is using wal mart target ammo , or low end match ammo , the 52 reamer has out performed most reamer designs with a wide ammo choice including HV ammo . Although my 12 yrs of testing and shooting 22 lr isn't definitive , it's convinced me .Not for nothing but if you take your stuff to a smith and he gives you a Win 52 chamber then you better find a better smith because a lot has happened since 1965.
Please , not being offensive , help me continue testing with your testing results please .
Gary