I know now that the modern 1885s have been made in the WSMs (Brownings rendition of the 1885). I'd NOT rent a reamer from 4D or any other for any project, let alone a 'special' project. With the current climate of the "do-it-yourself", you've got to wonder about the tools and how they were used. If you are a machinist, you understand tool 'condition''. Did the guy before you chuck it up in his B&D and have at it. Read 4Ds info closely, they'll only be liable for the cost of the tooling rental, no more. The only time I rented a reamer it arrived with an egg-shaped pilot (removable pilot reamer). I've got a pretty good selection of pilots so the job proceeded. The point is, if they missed a bad removable pilot during their 'inspection', what else got missed? Is not ISCAR or Kennametal tools 'better' than the Chinese imports? Same holds true for chambering reamers. There are better choices, much better choices, than what the reamer renters offer. What material are the actions made of?