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In Praise Of Gravity/Beam Scales

sparker

  1. In a recent match of four strings of 20 shots at 800 yards, my average velocities for the four strings were 1389, 1387, 1390 and 1389. SD was right around 8 FPS per Shot Marker values at the target.
  2. Those who are mathematically inclined, have already surmised that the SD for the averages of the four strings is smaller than the SD for any 20 shot string.
  3. How can this be? First, a load that produces consistently uniform velocities and pressures through the temperature variations. Second, the absence of drift. The scale reads the same regardless of time of day or temperature swings.
  4. While many may tout the low deviation values of this load or that load, it is rare to see the level of ballistic uniformity that I experienced.
  5. I use a tuned beam scale. I always know exactly how many kernels of powder are in a case.
  6. You should too!
 
I tried E-scale/drop/trickle and found no advantage. I am very happy with my balance beam scale and trickler. I can assemble two complete rounds ready to shoot per minute or weigh and charge four in the same time. I am fine with that. My Palma load SD numbers are in the 5-7 on a regular basis.
To each their own!
 
A well Tuned Beam Scale works with your cell phone in the room ?
You don't need a Line Controller or LED Lights or electricity !!

That $ 1,750.00 Buys Powder and Bullets

I will admit I have all that Stuff Plus !!! I sometimes Wonder ????

I made Distinguished Riflemen State Top 10 and High Master Long Range all with a RCBS 304 ( It gave up after 25 years ).
Then the Trip Down Rabbit Hole Began .. $$$$$$$$$$
 
sparker said:
  1. In a recent match of four strings of 20 shots at 800 yards, my average velocities for the four strings were 1389, 1387, 1390 and 1389. SD was right around 8 FPS per Shot Marker values at the target.
  2. Those who are mathematically inclined, have already surmised that the SD for the averages of the four strings is smaller than the SD for any 20 shot string.
  3. How can this be? First, a load that produces consistently uniform velocities and pressures through the temperature variations. Second, the absence of drift. The scale reads the same regardless of time of day or temperature swings.
  4. While many may tout the low deviation values of this load or that load, it is rare to see the level of ballistic uniformity that I experienced.
  5. I use a tuned beam scale. I always know exactly how many kernels of powder are in a case.
  6. You should too!
Click to expand...

Thank you for the repot Scott! Love your scales there spot on!
Wayne
 
No offense intended Scott but there is a reason that in research and testing labs across the world MFR analytical balances have uniformly replaced beam balances decades ago. Beam balances certainly can measure to kernel precision but electronic balances do have advantages in versatility.

Robin
 
rardoin said:
No offense intended Scott but there is a reason that in research and testing labs across the world MFR analytical balances have uniformly replaced beam balances decades ago. Beam balances certainly can measure to kernel precision but electronic balances do have advantages in versatility.

Robin
Click to expand...
See this:

High Speed Beam Precision

Can count individual kernels of IMR 8208. It dampens out to read right at 4 seconds!
forum.accurateshooter.com
 
The FA Intellidrop drops within +- 0.05gr, does not drift and it does have auto caliber for the powder being dispensed. I am very happy with it. I double verify on another +-0.02gr scale and after few double checks, the powder goes straight to the case.


+- 4fps variation of full case load would not make a dang difference at 1000 yards
 
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