I bought some acetate overlay scoring aids on ebay they were made by Cibles Canada and have a full 10 m air rifle target and a partial 10 m air pistol on them. When I got them the air rifle lined up perfectly but the air pistol does not line up with the NRA B40 targets I've got it's close but appears to be just a little smaller when I align the one ring the opposite side is off by about 2 mm (1/8") on the five ring.
Is there a difference between the ISSF and NRA 10 m air targets? I thought they were the same or how do I determine if the problem is my NRA approved targets or the overlays?
Thanx
ken
ISSF vs NRA
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For what it's worth, 1989 (January 1) is exactly the date when the ISSF switched to the slightly smaller targets. I don't know if the NRA made the change at the same time, but it seems reasonable. And if it did so, then it stands to reason that the "1989" on the targets is meant to indicate that they are the "new" model (rather than being the year of print or something like that). So I have no good explanation for the discrepancy... But why not just measure the rings on the targets (and on the overlay)? For the "new" target, the diameters should be as follows (copied and pasted right from ISSF 6.3.2.6) when measured between the outer edges of the rings. If they are off by 2 mm, an ordinary ruler should be sufficient to spot it.
10 ring 11.5 mm (±0.1 mm) 5 ring 91.5 mm (±0.5 mm)
9 ring 27.5 mm (±0.1 mm) 4 ring 107.5 mm (±0.5 mm)
8 ring 43.5 mm (±0.2 mm) 3 ring 123.5 mm (±0.5 mm)
7 ring 59.5 mm (±0.5 mm) 2 ring 139.5 mm (±0.5 mm)
6 ring 75.5 mm (±0.5 mm) 1 ring 155.5 mm (±0.5 mm)
10 ring 11.5 mm (±0.1 mm) 5 ring 91.5 mm (±0.5 mm)
9 ring 27.5 mm (±0.1 mm) 4 ring 107.5 mm (±0.5 mm)
8 ring 43.5 mm (±0.2 mm) 3 ring 123.5 mm (±0.5 mm)
7 ring 59.5 mm (±0.5 mm) 2 ring 139.5 mm (±0.5 mm)
6 ring 75.5 mm (±0.5 mm) 1 ring 155.5 mm (±0.5 mm)
Thanx I couldn't find the ISSF specifications when I looked on line. The target is correct the overlay does not match it looks like the tehe ten ring is 10.5 and the seven ring is 57.5 Maybe it's not a 10m air pistol target and it's a 22 target instead? I was told it was the issf equivalent of the nra b40 but the sales guy may have made an assumption.