I had my bolt fluted and cerakoted by LRI. Looks amazing. My brother had a 300WM carbon Bartlein barrel chambered by them also and it’s a rail gun. They also take pictures during each stage of the process and post them to your account which is pretty awesome.
Rifle in top of photo is a 700 receiver with K&P cut rifle barrel chambered/fit in 240W by Long Rifles Inc. Lower is an Origin/Benchmark chambered/fit in 22CM by TS Customs. Very pleased - both excellent to deal with + crazy accurate results! Both outfits are faster turnaround than typical.
If you go with LRI and they suggest a K&P barrel, jump on it.