extremearchery01 Wrote:First off thanks for all the information everyone, getting started on reloading for 20" AWS and appreciated seeing some new links I hadn't found yet. I'm curious though I almost purchased the Accurate 2520 powder yesterday (settled for Win 748) and now that I read through Accurate's load data why is Alexander using 2520 at +30 gr while Accurate is saying 2230 at low to mid 20 gr. I guess why would Alexander be using a powder the manufacture isn't?
First off welcome to the forum extremearchery01!
Accurate has sourced powder from different powder manufacturers over the years and some lots can produce more or less pressure for the same weight charge. I read where AA pressure tested their data but I’m unsure which method.
Western/Accurate list data from 20” barrel plus list pressure data. I’d trust Western/Accurate Data as it is with current lots of powder. In regards to Alexander Arms, many times the only data listed is the maximum load so it is import to reduce the charge and work up in your individual firearms. When Alexander Arms listed his reloading data there was very little reloading data available. Fortunately we have a better knowledge base on the 6.5 Grendel today.
I’d also suggest you consider purchasing the 6.5 Grendel handbooks.
https://www.ar15buildbox.com