Mounted a 3-9 scope on my gun. Sighting her in at 25 yards I could basically put the bullets into one hole. Got about 1" group at 50 yards. But at 100 yards the group has become about 5". Shooting from a wooden bench rest on a bit windy day. What should I be concerned of?
Help identify the problem with accuracy at different ranges
- Thread starter svt-40
- Start date
svt-40 said:
thats even worse, any gust or lack of gust will directly affect bullet flight.... wind is wind, any at all affects your accuracy and even more so when your on the needle point of .22lr accuracy.
at 100 yds with a high velocity 40gr you are dropping 6-7 inches and and even a 10km wind will move bullet impact 6-7 inches...... so right there if you have any error on your end your throwing your shots all over the place.
read this thread... http://www.canadiangunnutz.com/forum/showthread.php?t=63954
No, no! I did not expect to shoot 1 MOA at 100. My ambitions do not go that far. But I was surprised by the accuracy loss of about 5 times from only moving the target twice that far. I thought, my group should have been in 2-3" range, alas, I overestimated.
You don't have to spend too much on a rifle to get decent groups. My CZ's have all been capable of 1/2" groups at 50 and -2.0" groups at 100. But you will definately have to try some different ammo. Start at the cheapest and work up. I have found the lower end Lapua's, Federal, CCI standard, PMC scoremaster have performed well. I've never had much luck with the lower end Eley's.
For some strange reason, my experience is standard velocity seems to do better in the wind than hi-v.
For some strange reason, my experience is standard velocity seems to do better in the wind than hi-v.
Finaly someone else who thinks .22s and accuracy are darned tough
to achieve. A short while ago I read .6" grps average at 100 yds...right.
I can shoot a single bughole at 25 in doors, set up outside and in a breath
of wind have a lot of trouble staying under 3/4" at 50 shooting a multitude of high quality 22s. I also have loads of various ammo to shoot in them and try it all trying to find favorite food for them.
These guys that actualy shoot the USBR targets in competition scoring in the 240 plus range
must have the finest equip. and very very good. Which they apparently are, and I thought
I was reasonable, till I tried it a lot of times.
to achieve. A short while ago I read .6" grps average at 100 yds...right.
I can shoot a single bughole at 25 in doors, set up outside and in a breath
of wind have a lot of trouble staying under 3/4" at 50 shooting a multitude of high quality 22s. I also have loads of various ammo to shoot in them and try it all trying to find favorite food for them.
These guys that actualy shoot the USBR targets in competition scoring in the 240 plus range
must have the finest equip. and very very good. Which they apparently are, and I thought
I was reasonable, till I tried it a lot of times.
If I am looking to make tiny groups at 100 yards with my 541 S or T, I first find out which ammo works best at shorter distances, then I chrony about 20 rounds of the lot number to see if there are any high/low variants. If there are no surprises. [I like +- 10 fps or less] Then I sneak out early in the morning when breezes are at their minimum and shoot my groups. By doing this I have been able to realize the potential of my rifle/ammo combination. It is not impossible to shoot sub-moa groups when you cover all the bases and have good equipment. My best 10 shot group at 100 meters is .488" and I have shot 200 meter 5 shot groups under 2" using the same strategy. It is not always the most expensive ammo that shoots best either. For example, None of my rimfires have shot exceptionally well with CCI Green Tag. My 541T just dotes on a certain lot of old PMC UnplatedZapper, and will shoot in the .2's and .3's at 50M I am hoarding the last three bricks of this stuff, since I have not found an equivalent in any HV 22 ammo. One has to experiment a lot to get all the factors sorted out, but it is worth it if you like good groups. Regards, Eagleye.
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- Location
- calgary, AB
I actually retired the .22 for gopher outings. Got a 17 hmr that does wonders! 1" groups at 100 yrds are easily achived even with a cheap savage and cheaper bushnell scope. The ammo may be higher cost, but think of the cost of finding the right ammo or taking 5 shots just to hit a gopher!
I still keep the .22 for outings with my son (he's 10) to shot pop cans!
I still keep the .22 for outings with my son (he's 10) to shot pop cans!
I was just out testing my new Savage .17 HMR on the weekend, and while it is pretty sweet, it's pretty vulnerable to wind too. Once I got it on the paper and started putting groups in at 100 yards, I was at first pretty disapointed with 6 or 7 inch groups, after hearing stories about sub-MOA rifles. But then I actually looked at the groups and thought about them, and while they were generally big, they were only big horizontally - they were probably averaging 1" vertically, and I was shooting through a crosswind.
Problem is, the wind never cooled down, so after 200 rounds through the new gun, I still don't know what she can do.
Also it looks like it likes to be shot dirty - the groups tightened noticeably after 20 or 30 shots. Anybody else find the same thing with the HMRs?
Problem is, the wind never cooled down, so after 200 rounds through the new gun, I still don't know what she can do.
Also it looks like it likes to be shot dirty - the groups tightened noticeably after 20 or 30 shots. Anybody else find the same thing with the HMRs?
- Location
- calgary, AB
I noticed that as well but blamed "the new gun feeling". I've cleaned mine after about 2000 rounds but did not effect accuracy.
The 17 is effected by wind, but I haven't seen it that bad. Light breeze drifts the bullet about 1 in. at 100yds. Once you get used to how it shoots you'll be amazed to get tight groups at 200 yds even 300 yds! Trust me!
The 17 is effected by wind, but I haven't seen it that bad. Light breeze drifts the bullet about 1 in. at 100yds. Once you get used to how it shoots you'll be amazed to get tight groups at 200 yds even 300 yds! Trust me!
The answer to why high velocity ammo suffers more than standard velocity over distance is relatively simple. The bullet leaves the muzzle at supersonic speed; at 25 yards to about 45 or 50 yards it's still supersonic, by 55 yards it slows to transonic speeds and at 100 yards it's subsonic. As the bullet passes through the transonic speed range it is buffeted by compression related shock waves which cause it to wobble. Standard velocity ammo starts subsonic and stays that way. For best results in any type of shooting the bullet should stay either supersonic or subsonic but should not pass through the transonic velocity range.
22 accuracy
Rimfire shooting is really frustrating shooting because of all the contributing factors slow moving bullets atmospheric conditions wind and even your attitude play a big part in your results. You can site a rifle in dead on today at 50 yds and tomorrow with no changes in the rifle it may shoot even inches off. The sun coming up thru the day changes your point of aim. Site in at the range on a beautiful morning around 8 am then when the suns up top around noon try her again wow she will shock you. I dont know the chemistry i only know the results. Being a consistant rimfire shooter takes a lot of patience and practice with your firearm. It is one of the most challenging rifles to master the 22 rimfire.
Rimfire shooting is really frustrating shooting because of all the contributing factors slow moving bullets atmospheric conditions wind and even your attitude play a big part in your results. You can site a rifle in dead on today at 50 yds and tomorrow with no changes in the rifle it may shoot even inches off. The sun coming up thru the day changes your point of aim. Site in at the range on a beautiful morning around 8 am then when the suns up top around noon try her again wow she will shock you. I dont know the chemistry i only know the results. Being a consistant rimfire shooter takes a lot of patience and practice with your firearm. It is one of the most challenging rifles to master the 22 rimfire.
