The 100 ring on the ARA target is .500. Any 25 shot group, that measures .499 outside edge to outside edge, is properly centered, would score 2500. Subtract any number you want, it doesn't matter. Getting those groups centered is the hard part. I just try to shoot one point higher that my closest competitor, and don't worry about group size in score shooting. All these small groups, that have set records, are difficult for the average shooter to obtain. Just go out and try your best and get all the practice you can afford. Attending actual matches, will tell you more about your equipment and skills, than just trying to shoot small groups by yourself.
Thanks Fred
I was pretty sure .500” was the correct size, but ARA’s web site doesn’t provide those dimensions.
Also, I’m aware of the increased difficulties involved in score shooting vs group shooting. One encompasses both accuracy and precision shot placement and the other deals only with accuracy.
I’m only trying to make an interesting observation about what might constitute the accuracy level “only” when trying to quantify the potential of a rimfire to shoot a perfect score. After all, that’s what the original poster of this thread wanted to know.
If I make the assumption that .499” (The Bull diameter minus .001”) - .224” (The score plug dimensions used in certified matches) = .275”, then that magical number for perfect scores in ARA is correct for a 25 shot group.
Is that right? Please let me know if it isn’t.
Okay, if the above is true, we have one more problem.
No one is going to be willing to shoot 25 shot groups for determination of firearm accuracy or ammo testing.
I hope everyone is aware of the nature of group enlargement with the addition of each shot. I think we all know 2 shot groups will be smaller that 3 shot groups, 3 shots smaller than 5 shots, 5 shots smaller than 10 shots, etc.
Without doing a detailed statistical analysis for the group growth of 5 vs 25 shots, I’ll just make an educated guess which could be wrong and estimate that size as being somewhere in the low .2’s.
I have to go to work, so maybe someone else can jump in with a closer number.
Does this make sense to anybody or have I made any obvious errors?