bsa 1917, That has been my experience with the 270 over a bunch of decades and with several different rifles. Even more curious is how most of them would/will throw 130 -150 grain bullets to the same place. I've loaded some 85 gr TSX's to trial and they are exhibiting the very same characteristic. Thinking I might try that on a deer next month.
Imagine your grave on a windy winter night. You've been dead for 70 years. It's been 50 since a visitor last paused at your tombstone..... Now explain why you're in a pissy mood today.