May 24th, 2016

New M1000 Balance Beam Scale from RCBS

RCBS M1000 three poise balance beam scale

What was old, is new again… RCBS has just introduced an all-new balance beam scale, the RCBS M1000 Scale. RCBS claims this magnetic-dampened scale will weigh up to 1,000 Grains with +/- 0.1-grain accuracy (one-tenth of a grain is about three kernels of Varget). The new M1000 mechanical scale features a magnetic damping system for fast readings, and maintenance-free movement. A newly-designed “tip-proof” pan should ease powder loading. Notably, the M1000 scale was designed to work in both right-handed and left-handed configurations. Curtis Smith, RCBS Product Director, explains: “For those who choose mechanical scales, accuracy and reliability are top priorities. The new M1000 scale provides exactly that for both left- and right-handed users.” The scale is quite affordable — it is available now at for $129.59. (MSRP is $159.45.) For more information, visit

Click HERE for RCBS M1000 Balance Beam Scale Users Manual

Triple Poise Operation with 1000-Grain Capacity
The scale has some interesting features, including three poises (weight index adjusters). The main poise goes to 1000 grains, while the medium poise runs up to 20 grains. The most precise small poise spans one grain in tenth of a grain increments. The rated capacity of the RCBS M1000 scale is 1000 grains.

RCBS M1000 three poise balance beam scale

Multiple Reference Pointers for Target Weights
The M1000 also features multiple pointers which can be used to set target weight ranges. This speeds up operations. According to the M1000 Users Manual: “[There are] three separate pointers for easy reading of over and under loads. The center Pointer is what is used when balancing the scale and establishes a ZERO Balance. The top and bottom Pointers represent approximately 1.5 grain above and below target load. The top and bottom pointers allow the user to quickly weigh loads knowing that if the beam pointer is oscillating between the top and bottom pointers the load is within +/- 1.5 grains. Having top and bottom pointers also eliminates the need to move the small poise to check powder charge variations.”

RCBS M1000 three poise balance beam scale

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September 1st, 2014

Tuning Balance Beam Scales for Precision and Repeatability

While many folks enjoy the convenience of an electronic powder scale/dispenser such as the RCBS Chargemaster, some hand-loaders still prefer to use a traditional balance beam. Balance beam scales are simple, compact, and don’t suffer from electronic “glitches”. Morever, even if you use a digital dispenser at home, when you’re doing load development at the range, a balance-beam scale may be more convenient. A scale doesn’t require electrical power, so you don’t need to bring battery packs or string long power cables. Just bring some kind of box to shelter your beam scale from the wind.

Tuning Balance Beam Scale

While designs like the RCBS 10-10 are decent performers as built, they can be made much more precise (and repeatable), by “tuning” of key parts. Forum member Scott Parker optimizes a variety of popular beam scales, including the Ohaus 10-10 (USA-made model), RCBS 10-10 (USA-made model), RCBS 5-10, Lyman M5, Lyman D5, and others. You send Scott your scale, he tunes the key components, tests for precision and repeatability, and ships it back to you. The price is very affordable ($65.00 including shipping in USA).

Scott tells us: “I have tuned several 10-10s. They all have turned out very sensitive, consistent and hold linearity like a dream. If only they came that way from the factory. The sensitivity after tuning is such that one kernel of powder registers a poise beam deflection. For repeatability, I remove the pan and replace it for the zero 10 times. The zero line and the poise beam balance line must coincide for each of those 10 tries. I then set the poises to read 250.0 grains. I remove and replace the pan 10 times with the calibration weight. For linearity, the poise beam balance line and the zero line should coincide within the line width. This is roughly one half a kernel of powder. For repeatability, the poise beam balance line must return to that same balance point ten times. I then adjust the poises back to zero and recheck the zero. I have a master’s degree in chemistry, thus I am very familiar with laboratory balances. Email me at vld223 [at] or give me a call at (661) 364-1199.”

The video above, created by British shooter Mark (aka 1967spud), shows a 10-10 beam scale that has been “tuned” by Scott Parker. In the video, you can see that the 10-10 scale is now sensitive to one (1) kernel of powder. Mark also demonstrates the’s scale’s repeatability by lifting and replacing a pan multiple times. You can contact Mark via his website, To enquire about balance-beam scale tuning, call Scott Parker at (661) 364-1199, or send email to: vld223 [at]

Video tip from Boyd Allen. We welcome reader submissions.
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