Just wanting to know how many clicks up on my scope (1/4 movement) would 5MOA be. Ive got my 6mmbr zeored at 100yards and i want to adjust for 300yards but i need to come up about 5moa or 15 inches. How many clicks would that be at 300yards.
Clicks up
- Thread starter chriswillis87
- Start date
Chris,
your scope is likely calibrated in 0.25-MOA clicks, or something close (they're not that accurate usually). Therefore, 5-MOA is 5 divided by 0.25 = 20.
One MOA is 1.049" movement at 100yd, and that applies in a linear fashion at every range. So a four-clicks / 1-MOA adjustment on a quarter-MOA calibrated scope moves the bullet an inch at 100yd, two inches at 200yd and so on.
You don't say what your bullet and velocity are, but 5-MOA is likely to be a bit much adjustment for come-up from 100 to 300yd. Somewhere around 3.5-MOA is usually nearer to what is needed with a 6BR.
your scope is likely calibrated in 0.25-MOA clicks, or something close (they're not that accurate usually). Therefore, 5-MOA is 5 divided by 0.25 = 20.
One MOA is 1.049" movement at 100yd, and that applies in a linear fashion at every range. So a four-clicks / 1-MOA adjustment on a quarter-MOA calibrated scope moves the bullet an inch at 100yd, two inches at 200yd and so on.
You don't say what your bullet and velocity are, but 5-MOA is likely to be a bit much adjustment for come-up from 100 to 300yd. Somewhere around 3.5-MOA is usually nearer to what is needed with a 6BR.
107 smk's and they are about 2580fps. so for every 100yrd i go out its just plus and inch so how many clicks would i go up than
its a 30inch barrel. 107 SMK's isnt light its the heavist you can get. So how did you work out the clicks up
Pretty sure Lynn meant why are you using such a light charge of powder. 2580 fps is kinda slow and indicates a light powder charge. You should be driving those bullets around 2850 fps or so.
I'm no expert on the heavy bullets since my 6BR is a slow twist, however I've found the best accuracy is usually acheived by pushing the bullet as fast a possible, within the recommended limits of course.
I'm no expert on the heavy bullets since my 6BR is a slow twist, however I've found the best accuracy is usually acheived by pushing the bullet as fast a possible, within the recommended limits of course.
Chris,
the amount of come-up required is a combination of the bullet's BC and the MV you give it. With your mild load you're right on by saying 5-MOA (20 clicks) is needed. If the MV were 2,850 fps as suggested as a more reasonable level for a 107 in 6BR from a 30" barrel, the requirement drops to 3.8-MOA (15 clicks).
The effect of the low MV increases with range, as does the amount the bullet will drift in any given wind condition, so your low low load drifts 2.1-MOA in a 10 mph crosswind compared to 1.8-MOA with the faster load. This makes wind reading that little bit harder making it more difficult for you to compete against those with more efficient ballistic combinations. While the effects are relatively small at 300yd, they will increase substantially if you plan on shooting at greater distances, say 600yd.
Laurie
the amount of come-up required is a combination of the bullet's BC and the MV you give it. With your mild load you're right on by saying 5-MOA (20 clicks) is needed. If the MV were 2,850 fps as suggested as a more reasonable level for a 107 in 6BR from a 30" barrel, the requirement drops to 3.8-MOA (15 clicks).
The effect of the low MV increases with range, as does the amount the bullet will drift in any given wind condition, so your low low load drifts 2.1-MOA in a 10 mph crosswind compared to 1.8-MOA with the faster load. This makes wind reading that little bit harder making it more difficult for you to compete against those with more efficient ballistic combinations. While the effects are relatively small at 300yd, they will increase substantially if you plan on shooting at greater distances, say 600yd.
Laurie
Chris,
I have a 25 inch barrel and shoot 107 smk's. I use 28.9 grains of varget and CCI 450 primers. Zero'd at 100 it's 15 clicks to 300. Done it many times.
I don't have my stuff in front of me now but my cartridge base to bullet tip with the A-max was 2.330. The smks are longer. But don't measure them this way get a bullet comparator. If you base your reloading results on the tip measurement you'll go crazy. If you own a caliper that is ;D
With this set-up there's room in the case for more powder, but not much. I don't know if I could get to 31 grains without compressing it. It shoots real good as far as I know now. I'm not showing any pressure indications. It's a Savage Target action.
Take care,
Jeff
I have a 25 inch barrel and shoot 107 smk's. I use 28.9 grains of varget and CCI 450 primers. Zero'd at 100 it's 15 clicks to 300. Done it many times.
I don't have my stuff in front of me now but my cartridge base to bullet tip with the A-max was 2.330. The smks are longer. But don't measure them this way get a bullet comparator. If you base your reloading results on the tip measurement you'll go crazy. If you own a caliper that is ;D
With this set-up there's room in the case for more powder, but not much. I don't know if I could get to 31 grains without compressing it. It shoots real good as far as I know now. I'm not showing any pressure indications. It's a Savage Target action.
Take care,
Jeff
Skeeter that table is great where did you find it. Just to clear it up, Im using a Savage f-class rifle in 6mmbr with a 30inch barrel. My load data is 107smk's, 25.5gr ADI 2208, CCI BR2 primers, Lapua cases seated neally on the lands. They are pushing about 2580fps.
2.39 is my OAL
so what does the 4 mean than (eg 3.9x4)
Chris,
Let me take a stab at this if I may. Over the years I’ve had many a student have problems understanding the relationship between MOA and inches. If you try and constantly go back and forth between them at first, it will make you crazy. MOA is an angular unit of measurement that travels in a 360 deg. circle. There are 21,600 MOA in a 360 deg. circle. I tell you this because we are dealing with small portions of that circle when we make vertical or horizontal adjustments.
Now, here where a lot of people get confused. On your scope, you have already said that each click is = to ¼ inch. That dimension is established at 100 yards. Therefore 4 clicks should move the bullet impact 1” at 100 yards. When dealing with MOA everything stays dimensionally relative to the distance. So, at 200 yards, since the distance is now doubled, so is the amount that the “click” moved the bullet impact. To build on the previous post by Lynn and in answer to your question, the number “4” is the number of clicks that equal 1 MOA. A hopefully ease example will follow:
4 - ¼ moa clicks at 100 yards moves the bullet 1 inch
4 - ¼ moa clicks at 200 yards moves the bullet 2 inches
4 - ¼ moa clicks at 300 yards moves the bullet 3 inches
Are you starting to see a pattern here? Now, how does all this apply to our game?
On the targets that we shoot on in HP or LR they are dimensionally consistent to the distance that we shoot at them. So instead of trying to determine how many inches I need to move the bullet, (since they frown upon me walking to the target to measure it during a match), It’s easier to work in MOA. I know distance to the target, and I know that the target used for 600 yd. shooting is dimensionally the same as the target used for 1,000 yard shooting, (they look the same at their respective distances) Therefore amount of clicks that I need to use to center the next shot is the same regardless of distance and in the absence of wind.
Here is a scenario for you:
Regardless of the distance, (assuming you know it, and you do) you fire your 1st sighter shot and it hits the very edge of the 10 ring at 6 O’clock. You already know that the 10 ring is 2 MOA across, (unless you are shooting F class, then they are ½ that size). You know that you had a good hold and trigger squeeze and the shot should have been a center “X”. There is no wind to account for, so the question is; How many clicks, and in what direction do you more your scope to shoot a center “X” on your next shot, all things remaining equal between shots?
If you want to PM me with your answer, or have additional questions feel free to contact me. I hope this helps,
Lloyd
Let me take a stab at this if I may. Over the years I’ve had many a student have problems understanding the relationship between MOA and inches. If you try and constantly go back and forth between them at first, it will make you crazy. MOA is an angular unit of measurement that travels in a 360 deg. circle. There are 21,600 MOA in a 360 deg. circle. I tell you this because we are dealing with small portions of that circle when we make vertical or horizontal adjustments.
Now, here where a lot of people get confused. On your scope, you have already said that each click is = to ¼ inch. That dimension is established at 100 yards. Therefore 4 clicks should move the bullet impact 1” at 100 yards. When dealing with MOA everything stays dimensionally relative to the distance. So, at 200 yards, since the distance is now doubled, so is the amount that the “click” moved the bullet impact. To build on the previous post by Lynn and in answer to your question, the number “4” is the number of clicks that equal 1 MOA. A hopefully ease example will follow:
4 - ¼ moa clicks at 100 yards moves the bullet 1 inch
4 - ¼ moa clicks at 200 yards moves the bullet 2 inches
4 - ¼ moa clicks at 300 yards moves the bullet 3 inches
Are you starting to see a pattern here? Now, how does all this apply to our game?
On the targets that we shoot on in HP or LR they are dimensionally consistent to the distance that we shoot at them. So instead of trying to determine how many inches I need to move the bullet, (since they frown upon me walking to the target to measure it during a match), It’s easier to work in MOA. I know distance to the target, and I know that the target used for 600 yd. shooting is dimensionally the same as the target used for 1,000 yard shooting, (they look the same at their respective distances) Therefore amount of clicks that I need to use to center the next shot is the same regardless of distance and in the absence of wind.
Here is a scenario for you:
Regardless of the distance, (assuming you know it, and you do) you fire your 1st sighter shot and it hits the very edge of the 10 ring at 6 O’clock. You already know that the 10 ring is 2 MOA across, (unless you are shooting F class, then they are ½ that size). You know that you had a good hold and trigger squeeze and the shot should have been a center “X”. There is no wind to account for, so the question is; How many clicks, and in what direction do you more your scope to shoot a center “X” on your next shot, all things remaining equal between shots?
If you want to PM me with your answer, or have additional questions feel free to contact me. I hope this helps,
Lloyd
so another question how does it work for 1/8inch @ 100 and so on
Let's see if this helps, 1/4 is 1 over 4 correct? to get 1 you have to have 4 to get an inch so to move 1 inch at 100 yards there would be 4 clicks. 1/8 is 1 over 8 so to get 1 at 100 yards you gotta have 8 make any sense? what it boils down to is how you break down an inch, you have 1/4 or you break an inch into 4 equal parts and with 1/8 your just getting finer equal parts by breaking the inch into 8 parts. Smell what I'm steppin' in? Later,
Kirk
Kirk
yer i think i do understand it now its pretty simple really isnt it once its explained
Chris,
Just go get yourself some ballistic software and run the numbers... its that easy. The software I use is called Ballistic FTE (Field Tactical Edition). It holds all the G Drag tables, bullet manufactures, atmospheric conditions and works based off your inputs for bullet, velocity, drag model, sighting characteristics and atmospheric conditions. It provides results for specified ranges and windage settings along with ballistic charts, wind drift charts, trajectory by altitude and angle, and either MOA or Clicks and allows you to store your specific calibers and gun models in the software for future use and/or email.
I have an iPhone and all my data is stored right on my phone... so when I'm in the field I just open up the tables for my specific round, put it on Current Atmospheric Conditions and let the GPS unit provide altitude,temperature and LOS angle updates to the software while I'm in the field for instant correction to the tables.
Sure beats having to carrying note books with me of all my ballistic charts ;D
Just go get yourself some ballistic software and run the numbers... its that easy. The software I use is called Ballistic FTE (Field Tactical Edition). It holds all the G Drag tables, bullet manufactures, atmospheric conditions and works based off your inputs for bullet, velocity, drag model, sighting characteristics and atmospheric conditions. It provides results for specified ranges and windage settings along with ballistic charts, wind drift charts, trajectory by altitude and angle, and either MOA or Clicks and allows you to store your specific calibers and gun models in the software for future use and/or email.
I have an iPhone and all my data is stored right on my phone... so when I'm in the field I just open up the tables for my specific round, put it on Current Atmospheric Conditions and let the GPS unit provide altitude,temperature and LOS angle updates to the software while I'm in the field for instant correction to the tables.
Sure beats having to carrying note books with me of all my ballistic charts ;D
Thanks Necchi,
You said what I was thinking, as I don’t want to start a mud-slinging match here, but the KISS principle reigns supreme. When the “excrement hits the wind agitator” as the saying goes, you don’t have time for all that fancy stuff. If the 1st shot misses,(shame on you) and you are fortunate enough to see the bullet strike and get a 2nd shot, the ability to make a correction quickly and accurately is paramount.
Lloyd
You said what I was thinking, as I don’t want to start a mud-slinging match here, but the KISS principle reigns supreme. When the “excrement hits the wind agitator” as the saying goes, you don’t have time for all that fancy stuff. If the 1st shot misses,(shame on you) and you are fortunate enough to see the bullet strike and get a 2nd shot, the ability to make a correction quickly and accurately is paramount.
Lloyd
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