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prefrag. What my friend did was note group size with grease groove as cast, then deepen the groove a bit at a time, firing 3rd groups, looking for signs of inaccuracy or the bullet's coming apart in flight. Some of this is determnined by velocity. The 2100 fps attainable with .45 ACP (4") or nearly 2200 fps with 5", needs a slightly deeper cut(for reliable fragging in flesh) than does the 2300 fps (4" barrel) of the .460 Rowland.
 

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You know, all this split nose pre-frag business seems to be cut & try. Thats fine but without precise measuring instruments and production facility it seems like it would be extremely hard to produce these bullets so they would perform reliably every time. Since fine JHP bullets are available over the counter it hardly seems worth the effort.

Why don't you get your 'friend' to write up a report and submit it to American Rifleman or Handloader? If the bullets are so good, they will buy the story and then you'll have not only some extra money but fame as well.

RIKA
 
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