I found this surfing around. Hope this isn't a re-post but for all the people new to or considering Dan Newberry's OCW there is an excel spreadsheet available for download that would help simplify your charge weight work up for testing. It's not rocket science but if you're not a % or numbers person this spreadsheet would help you calculate your charge weight work up for your Point of Aim test (POA). It doesn't replace reading and re-reading Newberry's article but it helps with playing around with different Max charges for the visual types. YMMV and exercise caution as usual when reloading. Cheers! 
insert url in browser:
ammoguide.com/myag/articles/downloads/OCW_Workup_Calculator.xls
insert url in browser:
ammoguide.com/myag/articles/downloads/OCW_Workup_Calculator.xls
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