Jesse (JES) is a good guy. Am surprised he's still in business, as he's getting up there in years. I had him re-bore two rifles for me years ago. Since I had a house in Oregon at the time (and now live there full time), I dropped them off in person and chatted with him at his shop there in Cottage Grove each time I dropped off and picked up. Great guy. No nonsense, just get er dun kind of guy.
My first re-bore was my old Mauser 98 in 30-06 that was over 50 years old, and was time for some reconditioning of that rifle. I was concerned about accuracy of a re-bore, but that thing is more accurate now as a 35 Whelen with the re-bore than it was before (I also did some stock work on it that helped improve accuracy). It's my favorite rifle. It's very accurate with 250gr Speer and Nosler bullets. I bought up some North Fork and Hammer bullets for it also that it shoots well. I mostly hunt with the 250s. I since had my local gunsmith thread the barrel, and shoot it suppressed now.
My other re-bore was a Marlin 336 in 30-30. Jesse bored and rechambered it up to a 356 Winchester for me. I love the extra power and mid-bore bullet, and I swapped a lighter stock on it and put on a red dot sight. That is my thick forest elk hunting carry (although now I have a 450 Marlin that I carry more frequently). It's very accurate with the Speer 220gr bullets. I haven't tried the North Fork or Hammer bullets in that yet....on my to-do list still.
Having spoken with Jesse in person multiple times, and been happy with his work I would definitely recommend him. And do it before he retires. Depending on how backlogged he is, 2-3 weeks is normal turn around time.