New Bass Strings Buzzing

[pcpoulson at sbcglobal.net]

Last summer I restrung a 5' Hazelton grand using Mapes bass strings which I 
ordered through Pianotek. Since then the monochords have developed loose 
winding buzzing. I have taken them off and twisted them 3 times now, and 
when I come back to retune the buzzing has returned. I have had an 
occasional problem with a new string before which usually is remedied by 
twisting the string, but nothing as persistent as this. My guess is that the 
strings weren't swedged properly. Anyone else had this problem before, 
particularly with Mapes?
Thanks,
Patrick C. Poulson
Registered Piano Technician
Piano Technicians Guild