Quote from: REDLINE on July 06 2012 08:39:23 PM MDT

Quote from: sqlbullet on July 06 2012 12:19:09 PM MDT
Case head expansion is unique to each gun and should be tracked when working up max loads.  Any sudden change in case head measurement should be treated as an indicator of excessive pressure, and the next lower charge should be considered maximum for your gun.

--Mitch

For me a G20 is the platform (bone stock for now).

What do you use for a baseline measurement when you start out not knowing what pressure any given factory loaded round is at in the first place?  I suppose a book load of listed pressure value would be a good place to start for a baseline case head measurement?

I fire a couple of factory loads that perform how I like. I measure the case bulge and record that and other relevant data. This is my baseline for my gun. I have used this method safely in .40 for many years.

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