flintlok wrote:firtrees wrote: Very interesting. Thank you. I could follow the logic to some degree but not the graphs or engineering. What is "OCW"?
OCW = Optimal Charge Weight
http://optimalchargeweight.embarqspace.com/
This is all really interesting stuff. Thank you. If I am understanding it properly, ocw comes down to internal ballistic velocity to ensure that bullet exit occurs as close as possible to the moment the stress pulse pauses at the bolt face before proceeding to the muzzle again. Once this has been obtained further tweaking is done by way of bullet seating depth and primer changes. I had always thought the general idea was to stop the bullet at about 1/10,000 from the rifling (if possible) - period. Now it appears the seating depth issue is more complicated but the overall equation is simpler. Thank you once again.