How does it work?

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Pelletgage is a simple to use device to determine the head size of pellets in 0.01 mm (ten micron) increments. There are six ranges has ten round apertures precisely cut into a thin metal sheet. Accuracy of the diameters is assured by a state of the art laser cutting special alloy sheet steel - tolerance is +/- 0.0025 mm of indicated inside diameter. These range as follows:

cal       range

.177   4.45 to 4.54 mm

.20     5.05 ro 5.14

.22     5.48 to 5.57

.25     6.33 to 6.42

.30     7.61 to 7.70

.35     9.01 to 9.10

• To use it, roll or drop the head of the pellet into the smallest expected aperture. If the pellet head is larger, it will not drop into the opening. Move up to the next larger size(s) - diameters are etched in the metal - and the pellet will drop partially through aperture, always caught by the skirt. This establishes the size range of the pellet head as being between the smallest aperture it will clear, and the largest that it won't (commonly called a go/no-go).

• Pelletgage is NOT intended to re-size pellets. Some users have tried this, and it may work - but it would wear the metal aperture after many uses, and it could cause the pellet head to be misshapen from a perfect concentric shape around the long axis. My thought is to sort out the best pellets in the tin, not try to reshape them.

• The gage openings are cut through 0.008" type 304 SS sheet metal by a diode pumped fiber optic laser. PelletGage can be used to rapidly sort pellets by size, or simply to give you an accurate measure of the head diameter of that new tin of pellets you just received. Once you know what diameter your gun "likes", you can take steps to get that same diameter for better shooting results. You’ll be confident in that variable of the quest for accuracy.

• Testing has shown significant size variation in tins of quality pellets, and differences of mean diameter between tins of the same size and weight. This may be a key to finding that next tin of pellets that shoots so well. It can also be used to check the diameter of pellets used to "slug" a barrel.