New entry: Shot with aperture sights!
I am on an aperture sights kick these days, (new discipline for me), and was wondering how I could shoot this challenge using the official target. The official target is white on white, so there is not an aiming bull that I could see at 100m with apertures. I came up with a novel approach that I hope the Match Judge will accept as a valid method: I marked the center of the target and taped it to the back of a Cibles standard 100m aperture/irons target bull (8 inch aiming bull). I calculated elevation and windage clicks needed to move the 10-shot groups into each of the three white targets.
My calculations were slightly off for windage clicks, or the wind pushed the groups, but I managed to keep them on the official target taped behind the aiming bull.
Today's (March 4) conditions: Warm, about +2C. Light winds (weather channel said 6-8 km/hr with gusts to 10-15 km/hr, but actual range winds unknown, and the flags were moving).
Distance: 100m.
Indoor/outdoor range: bench in heated shooting house, rifle shooting through window port with end of barrel outside. This makes for interesting and unknown effects of barrel differential temperature. Ammo temperature is approximately indoor ambient, but it cools at the bench due to the cold air coming through the window port.
Rifle: Anschutz 1907
Anschutz aperture sights: Rear aperture sight iris set today at 1.3. Front aperture iris set today at 3.2.
Ammo: SK Biathlon Sport
Photo #1 shows the bench set-up:
Photo #2 shows the post-shot official target taped onto the back of the Cibles 100m aiming bull target. The cross-hair marks find the center of both targets, which are then used to line them up accurately for calculating elevation and windage clicks to space the groups into the appropriate official target area:
Photo #3 shows the shot targets peeled apart, with the measurements. My windage clicks ended up being a tad generous for the right side targets, but all rounds stayed on the paper:
Measurements were done on the top target because these had the accurate carbon ring around the holes. I checked the measurements on the underneath official target, and it is interesting that you can see a deformed paper ring around the hole, approximating the carbon ring. But for consistency I measured off the top target carbon rings.
Photo #4: Shows the same measurements on the official target:
Results: Not great, but I have a starter baseline now to challenge for improvement.
Group 1 = 1.560"
Group 2 = 1.713"
Group 3 = 1.379"
Average = 1.551"
Photo #5 Largest group 1.713".
