Stammster
Well-Known Member
^^^
As I suspected.
Same trend, no shift.
Your scale doesn't seemed jacked up.
You just have a couple that don't fit the trend that happened IMO to occur "by chance", for the possible reasons I speculated earlier.
I load develop similar to you. But for one shot ladders, I'm looking to see how the powder performs with respect to weight vs volume as a trend - in order to identify max and how "hot" that lot is vs published charge/velocity tables (or to calibrate Quickload) . In the case of 1 shot per charge, I weigh every bullet, case, water capacity test, double weigh charges, trim length, CBTO, etc. so that everything is the same as possible. I throw any out that seat with force (I.e. different neck tension.). In reality, I would still expect to see +/- 5-10 fps from what would be an average if you loaded 5 weights the same (aka. ES). This is why I find 1 shot Satterlee ladders often difficult to analysis. However, I guess it is possible to see a flattening trend over 4 charge weights deltas, but never over 2 or even 3. I'm not seeing that anywhere in your set, other than 48.7-49.3...but only when I close one eye and squint real hard. I would put more value in minimal POI changes at 3-4 adjacent points along the ramp.
If I'm looking for nodes of charge weights vs pressure, I'll shoot 3-5 shot groups and use the average. I'll throw out any obvious velocity flyers for the reason you have found. In doing so I actually put more value in the SD, ES, and group size anyway. In my experience, analyzing flats spots doesn't always equal small group size, clustered around a charge weight range - which gives me even more doubt about the 10 shot Satterlee method.
I realize you were short on time, so what you were doing seems logical. Good luck with the rest of your load development.
As I suspected.
Same trend, no shift.
Your scale doesn't seemed jacked up.
You just have a couple that don't fit the trend that happened IMO to occur "by chance", for the possible reasons I speculated earlier.
I load develop similar to you. But for one shot ladders, I'm looking to see how the powder performs with respect to weight vs volume as a trend - in order to identify max and how "hot" that lot is vs published charge/velocity tables (or to calibrate Quickload) . In the case of 1 shot per charge, I weigh every bullet, case, water capacity test, double weigh charges, trim length, CBTO, etc. so that everything is the same as possible. I throw any out that seat with force (I.e. different neck tension.). In reality, I would still expect to see +/- 5-10 fps from what would be an average if you loaded 5 weights the same (aka. ES). This is why I find 1 shot Satterlee ladders often difficult to analysis. However, I guess it is possible to see a flattening trend over 4 charge weights deltas, but never over 2 or even 3. I'm not seeing that anywhere in your set, other than 48.7-49.3...but only when I close one eye and squint real hard. I would put more value in minimal POI changes at 3-4 adjacent points along the ramp.
If I'm looking for nodes of charge weights vs pressure, I'll shoot 3-5 shot groups and use the average. I'll throw out any obvious velocity flyers for the reason you have found. In doing so I actually put more value in the SD, ES, and group size anyway. In my experience, analyzing flats spots doesn't always equal small group size, clustered around a charge weight range - which gives me even more doubt about the 10 shot Satterlee method.
I realize you were short on time, so what you were doing seems logical. Good luck with the rest of your load development.
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