X-fax: BTDT. I've several customs that are easily better performers than the factory rifles I have in the same caliber. Incidently, they are in 308 Winchester as well.
However, a good factory rifle can be a consistent performer providing the barrel is decent, chambered precisely, and action has close tolerances. Some people can shoot great with heavy factory set triggers, I can't.
I think people are putting waaaaaayyyy too much emphasis on building custom rifles. There's no gaurantee that a custom will out perform a factory rifle, though it is more likely to do so with a competent shooter behind the trigger.
A 2 MOA shooter behind a 1/2 MOA rifle still yields the same results.
I agree about the shooter........Not so much with the custom gun thing.
Here are my thoughts...
1) Most factory triggers are junk.
2) Most factory stocks are junk. They are way too flexible and/or do not fit (me) well.
3) Most factory actions need to be bedded and most need some form of tune up.
4) Some of the issues mentioned above can and do haunt shooters during load development creating all kind of frustration and costing plenty of money.
5) After all of that stuff is delt with the factory barrel may still be found insufficiently accurate and may need replacement.
6) Some factory barrels are accurate but foul like a pig. Clean, clean, clean. I for one hate cleaning barrels.
If a guy has the money and his time is worth anything a custom gun is the way to go...even if the accuracy of the factory rifle is better the tuned custom gun will normally be more consistent, better fitting, and easier to shoot.
Lots of guys have factory rifles that shoot well....No argument there. My own 300 win Rem Sendero is a good shooter but here are the things that bug me about it.
1) It needs a recoil pad $100.00
2) It needs a cheek piece.... $200.00 installed for the one I want
3) The factory trigger was adjusted $50.00. Still didn't like the pull so I went Jewel...$50.00 down the drain.
4) The action did not sit well in the factory bedding block and caused fliers $75.00
5) The barrel shoots sub minute, but I want more. More is not hard to get in a custom rifle.
6) The barrel fouls badly after 30 shots...Accuracy becomes 1.25+ moa until I scrub it out.
7) It had a J lock (which I hated) ...another $150.00
There is not right answere here, but there is nothing worse than shooting expensive junk.