BTW for our new " needle " target, the shooting gallery chalks behind the 6 mm hole dident do much for a visual reward.
So we did a experiment stuffing the hole through the chalks with chalk powder, and that instantly gave a better result.
Here my M8 hit a full chalk, but just smashing 1/3 or so of it behind the hole give a similar puff, you will see the cloud of dust drift across the field for many meters before it fade in the wind.
I will probably try something new along these lines with making another " needle " type target, but with a bigger hole. probably 8 - 10 mm CUZ this will be put up at 118 M distance, and a 6 mm hole is a very tall order for a .177 at that distance, if you need like 30 -50 shots to get one hit, that is more like a lottery and not shooting.
Still 10 mm hole will probably also need you to fire a few shots before you connect, CUZ the .177 are not repeating its shots very much, unsure if that is a general calibre thing or it is just the wind playing tricks.
I do mostly see l & R deflection / change in POI, but i do also see a little Up & Down so i think the flaky .177 calibre is also to blame a little.
And of course me the meat behind the rifle.
I have been thinking " i wonder if a piece of drywall would give a similar puff of dust"
That stuff here is like 10 mm thick so i figure cut strips of the stuff so they are 10 X 10 mm to put into the gravity magazine behind the "needle" target.