TargetTalk

Some of us cannot find a comfortable, warm, and suitable indoors 10+ meters for an air pistol range. It turns out that a 10 meter air rifle target projects at 5 meters a bull close to the perceived size of the 10 meter pistol target at 10 meters. The problem is how to gauge with acceptable precision the shot score.

By adding 4.5mm x 2 to each of the rings (line hits are "in") and then scaling the various 10 m. air pistol target rings including the pellet size addition at 50%, you can create the maximum spread that would be within each ring. (I know, there is a problem with the non-proportionable pellet hole size, 4.5mm at 5m and 10m., but this is GoodEnuf for fun.) I have used a 3-D printer to make measures corresponding to 10's down to 6's. Using the smallest measure to cover a group you get a serviceable feel for your group size projected onto a standard 10 m. air pistol target at 10 m.

With 12 bulls on a sheet and an appropriate target box, you can shoot groups of 3, 5 or 10 on lines of 4 bulls, without needing to move the target. The height is critical, and is addressed in posts by others; the target must be shifted after each line of 4 bulls. I use a remote camera with a nearby laptop to manage each shot, without having to scope the shots. The whole shebang is in a heated workshop/mancave.

I had the camera out to photograph pistol grips for another post, so took a picture of my measures, and was motivated to write up this method.

JE

To scale down ring size AND also scale for bullet size the rings have to be a lot smaller than half the size compared to those on a 10 m target. I know you also know that because you did mention it.

For those interested in more advanced converting continue reading:
My example shows how to do in with the 10-ring.

10-ring diameter: 11.5mm
Total target area for 10-ring: 11.5+4.5+4.5=20.5mm

Calculate target area vs distance ratio: 20.5/10=2.05


For 5 m conversion use this ratio:
Total Tanger area for 10-ring @ 5 meters:
5*2.05=10.25mm

Ring size for 10-ring @ 5 m: 10.25-4.5-4.5=1.25mm

So the 10 ring must be reduced to 1.25 mm to scale properly from 10 m down to 5 m.
Do the same procedure for the other rings. The black will have to extend beyond the 7-ring in order to look the same size though.

These conversions will reduce the amount a shooter can sway side to side (parallel to the target) which will amplify those errors, but one can’t have it all.

Remember to practice properly you have to scale the target height, which depends on your height.

You can calculate the right height and scale here https://www.olympicpistol.com/target-calculator/ The % of adaptation of the target should be helpful for all the size changes.