I have a question about headspace. SAMMI specs limit lengths to 0.850" -0.010". I have some cases for reloading that have been fired one or more times that measure between 0.8365" and 0.8459" (they were given to me). My question is, what dangers are there in reloading those that are up to 0.0035" under limits? Do cases expand in length as in bottleneck rifles.