Quote:
Originally Posted by Rule3
It is the same weight. Where is your data from? I specified the CO will be different.
If we spent all our time looking for specific tests for specific bullets we would be no where.
Every test is going to be different anyway.
No I do not own a Barnes manual as I do not use any of their bullets
The Hodgdon 3% "rule" is one of the most misunderstood statements out there. Heck in their own data you will find loads that vary much more than 3% as well as in other manuals.
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There is big difference in bore riding surface area and substantial difference in OAL between these the two bullets so weight is of less concern in the comparison.
With a cross section area of the 500 and about quarter of an inch difference in seating depth equals about 12.5 grains difference in case volume - very substantial.
The load data is mine as well as actual pressure test data (yes I have actual pressure test tools).
Barnes does not have any published data in their current manual for the 400 grain buster, but an email or call usually gets responded to in less than 7 days most of the time.
I agree that when the bullets are similar in weight
and construction it would be ok to use the data as a starting point.
I also agree with your assessment of the Hodgdon 3% rule.
When i did my original load testing the intent was to use the Barnes Buster on a Bison Hunt out of the 500.
In the end I only used the Buster (.452 version) in the 460 and used the 375 Barnes XPB in the 500. Both were used with success on the 1600-1700 bison we harvested.
Hope I have scratched your itch.
Good luck and be safe
Ruggy