well its not the most practical use of a 240gr bullet in a 300/221- the concept is for that bullet to be subsonic. You will be far better off pushing a 125gr at around 2400fps then trying to push the 240- 1200.
just curious why would you want to do that with the 240?
Personally I use the 220 SMK. I go thru several thousand a year and save about $80 per 1K with the 220's over the 240's.
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