Probably depends on the bullet you use, and I also go 1.17" with MG 115 JHP,
but I"ve loaded them as long as 1.18" and they worked fine.
my trubor snagged up on the 1.170's then i loaded them out to 1.175 and it ran like a dream
my load is 124 mg jhp
7.2gr of auto comp
decently hard crimp and an oal of 1.175