I have had one done by SSK. Their work seems excellent, but did not make the time frame I was told. However in their defense this was over the holidays, as I sent the barrel to them just before Christmas. Had the holiday season not been in the middle of all of this, I am confident the delivery would have been more in line with the time frame I was quoted.
If I remember correctly I was told 10 to 14 days is normal for a rechamber job.
Larry