This is the Speer 150 grain 300 Blackout bullet load I settled on. As you note... I settled for less velocity for the accuracy, even though the faster loads were far from inaccurate. Probably couldn't do this again if I had to (note that it's only 50 yards);
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Originally Posted by Riflehunter
Do you know what barrel length Speer is using for its figures?
16" Barrel.

Here's the first page with the details;
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Si vis pacem, para bellum