Interesting info on primers; large rifle first:
http://riflemansjournal.blogspot.com...mer-study.html
then small rifle ones:
http://riflemansjournal.blogspot.com...mer-study.html
Check the photos of the flash several make. Quite a difference. Especially the part in the large rifle primer tests:
Quote:
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We begin our process of data interpretation by bearing in mind Bob’s (Bob Jensen) early tests with the primer-powered, BB firing Model 70. Those test showed that the primers which produced the lowest velocities with reasonable SD in the Model 70 “BB gun” were the most accurate at 600 to 1000 yards when loaded in .308 ammunition. In fact, our own testing with the 6BR showed that the most accurate primers at 600 yards were those which produced the lowest velocities.
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