05-03-2024, 10:04 AM
Here is a paper that I wrote describing my adaptation of OBT and its use for a - what I call - practical reloader. ie, a regular guy with a decent but not necessarily premium barrel, nor an ocd competitor (who already has his/her own approach to reloading). A couple of disclaimers, lots of people (probably who are good shooters themselves) like on snipershide disbelieve or otherwise think this is bunk or whooey... whose comments I read from time to time to see if any insights can add to my understanding... but in general I look to my approach and the results I get, not to someone's opinion on an admittedly complex topic. #2. GRT (and probably QL) predicts nodes also, which don't always coincide with what I get from my spreadsheet calcs. Grt models the powder burn rate, and thus can develop its own acceleration profile of the bullet (that model may be more or less accurate, and the actual response you get from your bottle and lot# probably differs from the Grt); I use a simplified one instead. #3. I have a belief that for most barrels (to some degree), powder choice and pressure curve results are not as dominant as the physical characteristics of a nominal 18-26" barrel. Ideally, maybe yes, but practically, I haven't seen that much of an issue.
Standard disclaimers like no guarantees of safe nor useable results, use at own risk, etc.
Standard disclaimers like no guarantees of safe nor useable results, use at own risk, etc.