Quote Originally Posted by Jonathan View Post
How can the chamber be an unknown? The chamber will either be cut to SAAMI or CIP specs. There will be minimal differences between chambers, and not enough to make a discernible difference in case capacity. The biggest difference will without a doubt be in the internal capacity of the case.

I don't think it's a case of 'overthinking' or 'what rocks your boat' as reloading for precision shooting is all about the accumulation of all the small details making a difference. Some people may not care about going from, say 0.6moa to 0.3moa group size, but there are those that do, and as I said, it's the small detail that is the difference.

Jonathan.
the chamber isn't that different? in that case my .308 homeloads would work in Boydy47's .308 ? even though he has pressure signs 2-3 grns before I do!
if you decided to use a high load based on Quickload you may fall foul of a tight chamber, the old way of working a load up is the way forward, the OP was trying to short circuit part of that process,
I just believe in this case that a manual is as good a way to decide on a starting point as any.
As to prescision shooting, its not for me, I shoot mainly off of sticks or a ruck, or the roof of a truck at fast moving targets after having my ribs and kidneys asaulted by the terrain! minute of rabbit works for me