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Old 09-12-2017, 05:00 PM
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fredj338 fredj338 is offline
Join Date: Feb 2006
Location: Kalif. usa
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You will always have variations in data as the test platforms, components & conditions are all diff. So I use at least 3 vetted sources & average data, trying to match bullets as closely as possible. At some point you will have to extrapolate for the diff bullets.
I like the Lyman & Speer, because they have decent lead bullet data. This is good for extrapolating for coated & plated bullets. Speer is about the closest to reality IMO, I get closer results with their data vs others.
NRA Cert. Inst. IDPA CSO
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