If you are loping along at 70rpm , and you're not using a flush system but cutting .05, cleaning the reamer and chamber an re-oiling, I'd say you're doing OK. Without a flush you will generate more heat at higher rpm if you're not real careful. And heat is one of the 'enemies' of HS tooling. I'm up around 200rpm if the barrel and reamer tell me "I can". I'm running a muzzle flush @ 30-35# , which is a good flow, but not a total mess (I run cutting oil). I drill and pre-bore to save wear on my reamers. If I take the pilot off I reduce the # on the muzzle flush. A steady flow clears the cuttings and keeps the heat down. The last barrel I chambered, just a few days ago, was a Brux in 7 mag. After dial-in, I was done cutting and head spacing in under 1/2hr. You need to remember though, I'm in a working machine shop daily, with "hands on". If you want to take longer, that's fine. Do whats comfortable and produces good results for YOU!