TargetTalk

There's 3 perpendicular axes about which the plate can be rotated. In my picture (see attachment): x is horizontal, parallel to the bore. z is vertical. y is horizontal, perpendicular to x and z. So both x and y are in the horizontal plane. The rule saying "Turning the butt plate on the horizon...

Hi, I am working on a PowerPoint presentation for a group of visitors to our club. They are new to ISSF shooting and I'd like to show them a few basics. Can anybody point me to suitable illustrations available on the web, showing e.g. the various ISSF shooting disciplines especially some photo's / i...

Every shot is a data point- providing distance from the centroid. Shoot 30 shots on one target. Yes, statistical tests (o.k., I cheat and use z scores on 30 shots instead of t scores; less rigorous but still quite useful when looking for subtle differences). Steve, Indeed, when you have the possibi...

Shoot 30 shots, calculate centroid (average x, average y point) then measure 30 distances from centroid. For each 30 shot group (sample), we then compare "average distance from centroid" using the "standard deviation of average distance from center." So for one group, you get on...

Steve Swartz wrote:After extensive testing, my Anschutz groups the same (no statistically significant difference) with CCI Standard Vel, RWS, and Eley Match Rifle.

Steve,
How do you quantify your shot group, and what statistical test do you use to establish significance?

Jeroen Hogema

For even more pressure use Your favorite brand new CD that you just paid $22.95 for. The thought crossed my mind. As long as I'm shooting around 560, I should stick with the garbage CDs... As for Albert's suggestion: vinyl records have a 0.7 cm diameter hole. A score of 10.5 or higher and your prec...

If you have old CDs, or scrap ones due to buffer underruns or while burning it, here's a suggestion. Take an air rifle target and tape it on the CD. Centre it precisely. Now go and shoot. Through the centre hole, of course. Without damaging the CD, of course. For many shots, of course. The hole in t...

Here's my understanding: The Rika's emitter is placed on the pistol and you identify the location to the Rika (sides or bottom.) The Rika sensors on the receiver must plot this in relation to the emitter. What they all do initially is register the x and y coordinate of the point of aim throughout t...

Hi John, If I understand correctly, you want to know how tight your groups must be if you want to avoid losing points due to your ammo. This depends on your performance level, i.e., what you would score when you are shooting well and you had perfectly grouping ammo. I have done some work on this iss...

You mean this one? http://www.schuetzenwelt.de/shop/7/buecher_videos/53/buecher/2623/mec_luftgewehr_schiessen/ I found it recently on the Stelljes website (a German post order firm), and would be interested to hear from anybody who has read it. They also deliver outside of Germany; see http://www.sc...

How many cylinders can I fill with a SCUBA tank? With Chairgun (demo version is for free), you can do some Bottle Charging analysis. If you know the volume of you bottle and of your cylinder, that is... If I use it with the spec's from my Haemmerli AR50, it says I can get about 40 to 50 charges out...

Original factory VO specs for the LGR --- the venerable nmatch air rifle that was the first single stroke pnuematic and broke all the existing world AR records --- was between 165 to 170 m/s (550 to 570 fps). There's a reply from Walther now, saying that the V0 for the LGR is somewhat lower than th...

A Walther LGR. You know, the 'old' (?) pre-compressed type.

For air rifle, I'm used to having V0 somewhere around 170 m/s. (I don't know why, come to think of it...) When is V0 so low that you'd need to have it looked after? (even when the grouping is still OK?) With the rifle of a fellow shooter, we measured a V0 of about 140 m/s. This sounds pretty slow to...

What are the advantages and disadvantages of having sight riser blocks? ... Much obliged, Raj Jacksonville, FL Some might say that with raised sights, the effect of variantion in cant angle on changes in point-of-impact becomes more severe. In short, I say it doesn't. If you're interested, you can ...

I would like to know some of the front sight aperture diameter and the ring thickness being used by rifle shooters for the 10M Air Rifle. ... In addition to front sight aperture diameter, I think you should also look at distance of the aperture from the eye. Putting the aperture closer to the eye h...