I only have (6) data points:


Bell and Carlson round block Aluminum on Remington or Savage round bottom receivers shoot poorly for me in 7mmSTW and 280AI.

Drop in Whidden V blocks worked poorly for me in 300WM and 280AI

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I built a homemade flat bottom Aluminum block for a 6.5-06 Mauser, and it shoots better than me.

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I built a homemade drop in 20 degree V block for a 250 Sav on Sav action, it shoots better than me.


There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps