Discussion thread - 2024 - 100 yard .22LR challenge

G

grauhanen

CGN Ultra frequent flyer
GunNutz
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Location
Northeastern Ontario
With the snow going earlier than usual across many parts of Canada, the 2024 shooting season is underway for many rimfire shooters. I visited my club's range two days ago for the first time this year after its access road, which remains unplowed in the winter, was declared sufficiently dry and fit for vehicular traffic by the club bosses. It was cold and windy so results were poor. But being able to get back to shooting was good.

As in the last couple of years, I wish to invite .22LR shooters to make an entry in the "100 Yard .22LR Challenge". This is not a contest between shooters, but rather a challenge for each shooter himself. How well can you do? Can you do better?

The rules and requirements are described in the first post in the thread itself. The challenge thread is here https://www.canadiangunnutz.com/forum/showthread.php/2297200-100-Yard-22LR-Challenge

Basically the challenge is to shoot at 100 yards/meters three ten-shot groups at the required target. Measure the center-to-center group sizes and calculate the average. This is a challenge for each shooter. Improved results are welcome.

The target is the same for everyone. It can be found in links in the instructions and below. I will email a pdf of the target to shooters requesting it. The target must be printed on 65 lb card stock.

The link immediately below should show the target.

https://drive.google.com/file/d/1PCc_bNidaPtRd6ywdP4dISZhLMYYE1-g/view

I haven't posted any Challenge results since 2021, when the Challenge was developed and begun by CGN member horseman2. I've acquired a couple of rifles since then, so if no one objects I may post an entry or two if I find that any of those rifles produce good results.

Observe the rules and be safe at all times.

The 100 Yard .22LR Challenge thread is for entries/results only. PLEASE DON'T COMMENT IN THE CHALLENGE THREAD ITSELF.

If you have questions or comments, please post them in this thread.
 
I've just acquired a CZ457 Varmint, hoping to get it going this week and post some scores for the challenge. So far I've not been able to best my posted results with the Vudoo ... but still trying!
 
Dirk said:
I've just acquired a CZ457 Varmint, hoping to get it going this week and post some scores for the challenge. So far I've not been able to best my posted results with the Vudoo ... but still trying!
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Very nice... should serve you well.

I'll have to enter again with my CZ457 chassis build now that I've got the IBI barrel on it. My CZ 457 American got the old varmint barrel used in previous entries... so I now have a very accurate hunting rifle for grouse this fall.
 
Be okay to dip my toes into this again. Curious if my 10/22 could improve from the 2.6" group. But with F class monthly targets, new dog, market season and trying to do other type of shooting. There not much room to try to improve the 100 yard shooting.
 
Thanks for organizing. As a new member of the CGN, I will be looking forward to joining this type of challenge. I currently do not have a scope, since I have been practicing fundamentals with the iron sight. Once I buy one I will participate in this type of challenge for sure. Thank you!
 
I had a new-to-me rifle out this morning to shoot at 100 yards. Using two different lots, I shot twenty groups and two of them were good, one with each lot.



Unfortunately one sub-.5 MOA group out of ten for each lot isn't a recipe for success. Inconsistent results seem to be a characteristic of this year's Lapua ammo, just as it was last year.

Today, for each very good group there was at least one that was three times the size. Of course, it must be allowed that conditions were a factor with some results.
 
That group on the left side is AMAZING! That’s some dam fine shooting. Well done. Frustrating too say the least when it can be soooh good and soooh bad all in the same package.
 
While I am agreement with "Longstud's" comment, I'm equally amazed that the slightly larger group has 7 shots in an impressively small hole. ( notice I have avoided comments by not saying quarter inch ! )

Well shot.
 
grauhanen said:
I had a new-to-me rifle out this morning to shoot at 100 yards. Using two different lots, I shot twenty groups and two of them were good, one with each lot.



Unfortunately one sub-.5 MOA group out of ten for each lot isn't a recipe for success. Inconsistent results seem to be a characteristic of this year's Lapua ammo, just as it was last year.

Today, for each very good group there was at least one that was three times the size. Of course, it must be allowed that conditions were a factor with some results.
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How where all the other groups? Interested to see the difference because with 2 groups like that you figure they can't be that bad
 
Ansterds said:
How where all the other groups? Interested to see the difference because with 2 groups like that you figure they can't be that bad
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Seeing a more complete picture is always a good idea.

Below are all the groups from yesterday, all with Midas +. The first ten groups on the first three target pages were shot with one lot, the other ten with a second. Each group is ten shots.

The results seen below are similar to most of the 100 yard results I've had with this variety of ammo in recent years. Last year I tested five lots 2022-manufactured Midas. I understand that these were all that came to Canada, the same number of lots as this year's 2023-produced Midas in Canada.

Often there would be a few good groups among others that were rather ordinary, some even bad. Occasionally there would be good fortune and consistent rounds would prevail over one or more targets and the result would be a good average size.

I'll know more about the nature of this year's five lots of Midas after I've tested more. But based on what I've seen so far with some preliminary testing I'm not counting on one of them to be significantly more consistent than the others.



 
propliner said:
How much do you guys need to dial up when going from 50 to 100?
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Okayshooter gives a reasonable estimate. The actual amount will vary from one rifle to the next, one variety of ammo to the next, but the ballistics chart below will give a rough idea about how much drop there will be from 50 yards to 100. That drop is what will have to be "dialed up" when zeroed at 50 and going to 100. It will be around 8.5".

 
grauhanen said:
Okayshooter gives a reasonable estimate. The actual amount will vary from one rifle to the next, one variety of ammo to the next, but the ballistics chart below will give a rough idea about how much drop there will be from 50 yards to 100. That drop is what will have to be "dialed up" when zeroed at 50 and going to 100. It will be around 8.5".

Click to expand...

What they tell us when we shooting F class, when we switch to 50 to 100. Go up 6.5 to 7.

I mean that's what my apeture gun requires from going from 50 to 100 yards. But also depends on the temp, way the wind is going.
 
Daniel G. Banting said:
Glenn: Any speculation as to why nearly all extreme flyers and subsequently the groups tend to be migrating to the left?
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One reason is that the scope was zeroed to the left throughout, more so on the first target where all scope adjustments were completed.

Another reason might be related to conditions, that is to say when the wind was a factor it would seem to have been from right to left.

I say "might be related" because there's a lot of left to right spread. That spread may be more than any wind differences between the widest apart shots would allow.

To explain, if the two best groups are representative of where the scope was zeroed, there were shots that went both to the left and right of that point. On target #2, for example, the bottom right bull had shots considerably to the right, which would suggest a left to right wind. The same is seen on target #3 on the bottom left bull which also had shots that went considerably to the right. Targets #4 and #5, on the other hand, had shots that went considerably the other way, to the left.

These left-right differences in impacts measure about 2 inches, which is considerable. The spread is close to equal on both sides of the zero, and occurs to some extent in the same groups -- for example in targets #3, #4, and #5.

If wind alone is the only reason for the left-right spread, it would require the wind to switch 180 degrees from one direction to the other.

At 100 yards each 1 mph of crosswind will move a .22LR bullet about 0.37" in the direction of the wind. At the simplest level this would mean that winds of about 2 mph would have to be switching 180 degrees. (Harder winds at an oblique angle could achieve similar results, but they would have to switch 180 degrees as well.) Of course I have no way to know exactly how much winds were changing or precisely in what direction. My wind flag reading skills don't permit this ability.

Since the conditions required for the wind alone to explain the left-right spread, it is possible that something else instead of, or in addition to, the wind is involved in explaining the results.
 
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