Thread: Suppressor rear bush sizing

Looking for some feedback on what the correct sizing (clearance) should be between the barrel and the rear bush on an over barrel suppressor. I have just fitted a DPT suppressor to a Sauer 100. Barrel diameter at the where the rear bush sits is 17.5mm. I had the store I purchased the suppressor from send the bush to DPT with that barrel measurement for the bush to be turned out for the correct clearance. I have just received it back and the bush ID is 17.6mm, so a 0.1 clearance on the barrel. i am wondering if this is sufficient. I also have a Tikka with a DPT suppressor, on this setup the bush to barrel clearance is 0.33mm. This was done a couple of years ago and from memory the bush was turned out for clearance at the shop I purchased it from and not DPT. So the question is which is correct? and more importantly is a 0.1mm clearance sufficient.