I have having a new .308 barrel made at Benchmark Barrels. My first custom barrel and I must admit I am excited but also a little nervous about it as well. I shoot F-Class and my bullet of choice is the Berger 185 and 200.20X. When discussing this with Benchmark they indicated that they would use a SAAMI Match Grade ream with a 0.110" freebore. I have read here from many of you that you have your barrels done with a 0.170" freebore. When I brought that up to Benchmark they thought that was excessive and suggested I contact Berger, which I did. they also thought the 0.110" was tight for the 200.20X and suggested I load a dummy round for them to gauge the freebore by. Berger suggested I seat the bullet to just above where the bullet tail started to fall off from the bearing surface to just above the point where the shoulder starts from the case bearing surface. I did some measurements and come up with seated depth that produced a bearing surface of 0.250". I choose this because this allows me about 0.115" of free space between a powder load of 39.6gr of Varget and the base of the bullet. Using a Hornady comparator that makes my case to ogive length 2.264". So does this seem right. Should I have seated it deeper? According to the SAAMI case measurements the neck is 0.303" If I were to seat it 0.050" more it would also reduce the free space between powder and bullet. I am concerned about potential powder compression. So am I stressing too much? Should I have them go by the dummy I created, but not to exceed 0.170"? Should I seat the bullet that extra 0.050" as a reference?