Referring to the original post and loading for .32 and .25, I know just where he's coming from. Way, way back in the '70-'80's I was into the European UIT precision pistol game. Pistols of choice were good quality, specialized .32.target pistols such as the Walther GSP, Des 69, FAS, Pardini, Hammerli etc.
These were straight blowback pistols and most shot the .32 S&W Long with a 98gn full wadcutter. It was always a balance between best accuracy v 100% reliability - long sessions with ransom rests were involved. The problem was, the charges were so small and needed to be so exact that I just couldn't get a measure to work consistently. When your desired charge is 1.5gns of Bullseye, a 10th grain either way is quite noticeable, so weighing each charge became general practice - however, I was needing to load around 300 rounds a week, which, apart from becoming mind numbing, it was extremely time consuming.
This spurred me on to make an auto-trickler, that evolved into the Targetmaster in around 1984 - working with a good beam scale it gave accuracy withing a kernel of two in a quarter of the time.
As for beam scales, most of them work very well and are sensitive enough to detect single kernels of powder, the main problem is actually seeing the deflection - for example, the Lee is one of the most sensitive scales but with a beam of only about 4" long it's almost impossible to see these tiny movements.
Adding a camera (or a phone) is very easy and cheap and will show even the smallest movement it will also eliminate any chance of parallax error.
Video Display for Balance Beam Scale within AccurateShooter.com
Monitor Balance Beam with Magnified Image on SmartPhone « Daily Bulletin (accurateshooter.com)
These were straight blowback pistols and most shot the .32 S&W Long with a 98gn full wadcutter. It was always a balance between best accuracy v 100% reliability - long sessions with ransom rests were involved. The problem was, the charges were so small and needed to be so exact that I just couldn't get a measure to work consistently. When your desired charge is 1.5gns of Bullseye, a 10th grain either way is quite noticeable, so weighing each charge became general practice - however, I was needing to load around 300 rounds a week, which, apart from becoming mind numbing, it was extremely time consuming.
This spurred me on to make an auto-trickler, that evolved into the Targetmaster in around 1984 - working with a good beam scale it gave accuracy withing a kernel of two in a quarter of the time.
As for beam scales, most of them work very well and are sensitive enough to detect single kernels of powder, the main problem is actually seeing the deflection - for example, the Lee is one of the most sensitive scales but with a beam of only about 4" long it's almost impossible to see these tiny movements.
Adding a camera (or a phone) is very easy and cheap and will show even the smallest movement it will also eliminate any chance of parallax error.
Video Display for Balance Beam Scale within AccurateShooter.com
Monitor Balance Beam with Magnified Image on SmartPhone « Daily Bulletin (accurateshooter.com)