OAL: 0.1" longer than SAAMI

[LynnJr]

There is something about this thread that looks familiar; I had a friend that built 4 magnificent rifles, he made the reamer and cut the stocks etc. When finished all 4 rifles should have been very similar but one of then shot groups like a shotgun pattern. The last person he asked was me.

He asked all of the usual questions like 'who dunit?' 'how did they do it'?, what caused it? And finally he asked me where I would start when eliminating all of the causes. I knew he would not take me seriously, but I told him anyway. He then went to the Internet for edification, after that he told me what the Internet came up with. He did not need me but that evening he shows up with his magnificent rifle, he wants me to show him what the Internet instructed him to do. Anyhow, the rifle was screwed, it had to have another barrel.

F. Guffey

If the same reamer is used in four different barrels and one barrel is 0.1 different in its freebore than the other 3 the gunsmith must be using a magicians wand to chamber barrels and not a conventional reamer as nothing changes barrel to barrel.

Unlike this poster I competed in benchrest competition for more than a decade and used my own reamers.
Using barrels from Brux,Broughton,Shilen,Lilja,Spencer,Obermeyer,K-P,Hart,Douglas and Pac-Nor the freebore was consistent as was the seating depth for best accuracy.
And that is with a dozen different gunsmith all using my reamer over a 12 year period of time.