Strange Day Good Day

[laowho]

Read your posts about these BCs over @ the Shiloh site Bruce. Fascinating stuff, and remember reading elsewhere that you cam your bullets into the lands. Been reading up on Audette's Incremental Load Development and Newberry's Optimum Charge Weight and then Young's barrel harmonic's follow up of Optimum Barrel Time. If I understand correctly, once I find Audette's plateau for optimum charge, I can then start looking for seating depth. Am makin up my dummy cartridges for the lands for 3 bullets, and even tho I read a lot about preference off the lands (maybe .005" to .010"), why wouldn't I just wanna do my ladders starting on the lands if that's where we wanna be? Dunno whether BP is different than smokeless in this or in other regards.

If I understand correctly, Audette's ladder gives me the charge that can best withstand variance during throwing. This shows up on a vertical stability zone. Then Young's barrel time has us finding that seating depth @ wh/ the bullet will exit when the muzzle has its longest non-deformed phase under the traversing shock wave, for best horizontal stability. If I have this right, wouldn't it be prudent to load for the lands first if there are advantages there, and then do my ladder tests? Seems the charge weights are still gonna work according to Audette's method. Otherwise, I'm havin a hard time understanding how you guys find optimum seating depth. Cheers, Doug