I just started reloading my 7mm rem mag.
I determined the COL by starting with an umprimed case and bullet set to just seat. I then tried this in my gun until the bolt would close.
Then I put dry erase marker on the bullet and the loked for marks showing I was contacting the lands. It was.
The COL was 0.100 inch longer than the Hornady manual has for the bullet. The Hodgdon manual was also shorter.
Does this happen? Have I mismeasured somehow?
My 243 was shorter than the Hornady COL making the 7mm a surprise when it was longer.
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