While at MCC I built a 700 for @Gray. Nothing I did was groundbreaking, there’s plenty of these projects out there on the internet, most notably, rifleshooter.com. He does a lot of neat projects. This rifle started out as a Remington 700p with a 20” barrel chambered in .308. I trued the threads, lug abutments, and receiver face. Installed a external bolt stop. The bolt lugs were squared up and a Badger M16 style extractor was installed. I TIG welded a straight PTG handle (funny story) on, and made a bolt knob. I had a .308 varmit profile barrel laying around that I cut both ends down, threaded, rechambered, and finished it out at 18”. I reused the original lug after I ground it to ensure both sides were parallel. I really enjoyed this project, I’ve done several so far, and had some good results. This is going to be pic heavy. I didn’t capture everything step by step with pictures, but I’ll explain everything I did as I go along. First I stripped the receiver and using a Manson 700 tooling I trued the receiver. In the kit there is a reamer, a tap and bushing that fit in the raceway. The reamer and tap have a long tail that goes into the raceway, and guide the cutting so that everything is concentric to the raceway. Once that is done, I put it in between the lathe centers with the receiver tap as a mandrel, and lightly cut the receiver face. In the picture, you may notice that there is still a bit of dykem present. This was after .002 material removed. If I remember correctly, it took .005 to square it up.
awesome project, and great description of the process. Thanks for sharing!