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Old March 22, 2013, 07:34 AM   #10
Jim Downey
Senior Member
Join Date: March 5, 2009
Posts: 206
I checked out the link and found it very interesting that the bullet slows down with a 17' barrel and then speeds back up one inch later with the 18' barrel . Almost every ammo tested did this . does anybody know why ?
We're pretty sure that there must have been a problem with the barrel chop/recrowning on that 17" test sequence. But we don't fudge the data, so showed it errors and all.

It might help to also look at our "Cylinder Gap" test results, which include a full second test sequence of chop tests. It's not a complete repeat using the same ammo as the first sequence, but there's a lot of overlap.

James Downey - BBTI handgun cartridge research - where I'm a features/review writer Communion of Dreams - my current novel.
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