Measuring

T

tim

Well-known member
I'm not sure how many rimfire shooters might be familiar with this but IBS score shooting has essentially moved away from the plug and to the reticle method of scoring.
Having played with one of these scoring reticles, I must say, it's pretty interesting.
Anybody have any thoughts about whether rimfire scoring at some point heads in this direction? I'm only asking out of curiosity.
 
Tim
I applaud IBS for the change. Muzzle loading competition at National competition has been scored that way for decades They add another wrinkle which is even better. The reticle is used to locate the shot and a second reticle locates the center of the target. A measurement from center of target to center of reticle is the basis for scoring. If you use best edge or worst edge is insignificant. You just specify the distance required for either value. It may take a little practice to get the technique down pat. However, it eliminates ink bleed, funny tears,etc. With only one caliber to deal with, it is a simple process. Only the border line shots would have to be measurements. Same as plugging, so no extra work involved. String values is just a red herring to avoid a serious discussion of the improvements possible
Don
 
Don, right concept, wrong tool. The score tool uses only a single etched ring that is coincentricly centered over the hole. You then can see if it is in or out, so to speak.
 
Tim
Simple step to add a center to the reticle and get away from present short comings in scoring
Don
 
tim said:
Don, right concept, wrong tool. The score tool uses only a single etched ring that is coincentricly centered over the hole. You then can see if it is in or out, so to speak.
Click to expand...

Sounds like and old Eagle Eye scoring tool.
 
This is one of those "picture worth etc.etc." I asked if somebody could post a photo over on the CF forum.
 
Don Stith said:
Tim
Simple step to add a center to the reticle and get away from present short comings in scoring
Don
Click to expand...

I started a thread over @ CF and Wayne Shaw posted a photo. Keep in mind the photo is of the multiple caliber tool, thus several reticles.
 
Tim,

I saw the picture of the scoring reticle over on the CF forum. Back in the days of BR-50 we rough scored our own targets. This was, of course, before the days of the infamous CD incident. Practically everybody used an Eagle Eye Scoring Tool to rough score. I think they're still available. To me, it looks like the same concept, but it was used to rough score only. You could do a pretty good job and once you became proficient with one, you rarely missed the call, but the plug was the official scoring tool.
 
My opinion on scoring methods . . .

I have used the Eagle Eye and the NRA plastic overlays years ago. The NRA overlays worked OK when trying to determine shot position when two or more holes cut into each other a scoring ring. But: We would never use the overlays on a single hole, as the scoring gauge was considered to be the more accurate method.

I also used the Sweeny reticule rule in Sanctioned NRBSA Tournaments. The reticule rule uses the same principle as the Eagle Eye. From experience I must say that the scoring gauge (plug) is more accurate than either of the optical reticules.

I have given a Sweeny Reticule to two different shooters and their measurements of a 5 shot group would vary as much as .010". It is best to have one person measure all group targets, and better to have the targets measured 3 times and take the average of the three. As careful as a person can be, they will NOT get the same group size measurements three times in a row with the Sweeny reticlule rule.

The Eagle Eye and that new IBS device work on the same optical principle as the Sweeny Reticule Rule. I have been scoring targets for more than 50 years, even "string" targets. In my experience, the plug type scoring gauge is the best we have at this time.

Joe Haller
 
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