Unlike most of the posters that have responded, I start all Barnes bullets at kissing the lands and work shorter by .005 in 3 shot groups for hunting rifles. Usually most rifles I shoot them in will shoot accurately somewhere between -.010 and .020. I have tried the other method without success so I started treating them just like cup and core bullets and it has worked for me. Calibers I have tried, 243,25,26,27,28,30 and 375 and all follow the same pattern and all shoot great between -.010 and -.020. I have found that most TTSX bullets like to run near the upper end of the velocity range.
Bill
