Commanche,
I don't have an answer to your exact question, but I will tell you from great experience that the 2 pellet 777 load behind a 250 grain bullet will kill your deer dead enough. No need to punish yourself or your gun by tossing another pellet in there. I used to use 3. Went back to 2 and the deer haven't seemed to notice the difference.
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NRA Member
NC Hunter's Education Instructor
PCCA Member (What's PCCA you ask? <- Check the link)
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