Gamo target for 10m air pistol?

[DobsOnly]

I was thinking about submitting a few targets for the March AP session. Can I use the gamo targets that came with my pellet trap? They seem to be the correct size for 10 meter air pistol but are not marked as being a 10 meter target.

[Random Plinker]

The Gamo target is not quite the correct size for 10M air pistol, but I've made some that are here:

Airpistol10M_45_SmallTrap.pdf
Airpistol10M_55_SmallTrap.pdf

The "45" target is for 177 caliber pellet holes.  The "55" target is for 22 caliber pellet holes.

If you print these pdf files with "scale to printable area" options turned OFF on standard letter size paper (8.5"x11"), they will print just right.  Cut on the dotted line, and you will have two targets that will drop into your 5 1/2" wide Gamo trap.
 
I do like to use the Gamo target cards as a cardboard backer for my printed targets.  They last for many target sheets.

I personally find the 5.5" square trap just a little too small to protect against that one in a million chance of missing the target box from 10 meters.   OK, I lied, it happens to me more than that.  I prefer to use a 10M Olympic Airpistol target scaled for 5M in a small trap like the Gamo cone trap.  See the "SmallTrap" target pdf files attached to this post for these targets:

10 Meter Air Pistol Targets Scaled for 5 Meters

And don't forget to flip the "x5" layouts with 5 bulls on them around before you shoot the top two bulls - there is no trap behind them until you flip them around!

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Edit:
Except for the 10 ring, the boxed Gamo targets are more challenging than the 10M Olympic AP target.  If you used them for an off-season match from 10M for AP, I wouldn't turn your entry down; however you'll miss out on scoring "X" (the printed Gamo target has no X ring) and in general your numerical score may be a little lower.  I'd stick with the 10M Olympic AP target.

Boxed Printed Gamo Targets; Ring(Diameter in mm):
       10(13.3), 9(25.9), 8(39.4), 7(52.8 ), 6(66.3), 5(79.7), 4(93.2), 3(106.8 ), 2(119.9), 1 (133.6)
[Measured by counting 600 dpi pixels on scanned target to outer edge of ring lines with photo editing software, then calculating the diameter of a circle with the same area as the pixels]

ISSF Olympic Air Pistol Target; Ring(Diameter in mm):
X(5), 10(11.5), 9(27.5), 8(43.5), 7(59.5), 6(75.5), 5(91.5), 4(107.5), 3(123.5), 2(139.5), 1(155.5)

Note the above Gamo ring dimensions are very slightly different than Gamo targets I've posted separately.  You'll note the ring spacing on the store bought printed Gamo targets is somewhat random.  At the time I made the Gamo targets I've posted separately on GTA, I measured the 1 ring with a ruler as 133.5 mm (versus 133.6 mm using a scanner and counting pixels - hey, I was close!), and except for the 9 and 10 rings, I forced equal ring spacing for rings 8 through 1, and I added a 3mm X dot.  The differences are trivial, but that is why they are there.

[DobsOnly]

Thank you!  Very informative reply.

I mount the trap on a 14 x 16 cutting board to keep the stray's in check. :-)

If I can get 20 straight on the paper I'll post'em up..

[ac12]

One problem that I found with that trap is you can't use a sub-6 hold very well.  I end up with the front sight near the bottom of the trap.  So I tape a piece of pain white paper to the bottom of the trap to give me a white contrast around my front sight.