DOPE/drop chart data.

[lyle_destroys]

To resurrect an old thread, any more pics of dope cards on stocks and scopes?

 

[16Bore]

Great idea, until you need readers....

 

[Sodbuster]

Great idea, until you need readers....

View attachment 88835

Thats getting to be my problem.My card is growing to the size of typing paper.

 

[brsnow]

Progressive lenses

 

[BrushyHillGuide]

Wow, this is an ancient thread!

It’s gotten even easier with my Kestrel 5700 ABS and Sig Kilo 3000BDX binos. Kestrel shows my solution, whether I want to dial or use my reticle for the hold, AND it sends the solution to my binos as well. So, as I’m hitting the range finder in the binos I’m seeing both the range AND my firing solution.


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[BCD]

No readers needed here.....yet

Realistically I can chop it off at 600 and increase the font

I like this- what wind velocity are the windage holds for?

 

[BCD]

Figuring wind drift isnt complicated. Though if someone is guessing with holdover at "500 yards" anyways, it probably won't matter.



This 223 with 77gr SMK and TMK's has 4mph wind bracket. Drop is within .2 mil when ran as-

300- 1mil
400- 2mil
500- 3mil

Can you please explain what you mean by 4mph wind bracket? It looks like standard elevation data and wind holds for 10mph.

Thanks!

 

[Timnterra]

I have used a piece of “write in the rain” paper write my drops from 300 to 700 and wind at 5,10,15 mph. I laminate the card and punch a hole through a corner and use a zip-tie to tie it to my scope tube.

 

[Agustas]

Vortex Dope Disk & Leica Range. Plenty for my 400yd circle of confidence. Range limited but my new loads walked right out to 300.

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Really like the lens cap chart idea !

 

[Formidilosus]

Can you please explain what you mean by 4mph wind bracket? It looks like standard elevation data and wind holds for 10mph.

Thanks!

What you see on the stock for wind is for 10mph for anyone that doesn’t understand brackets to use.

A wind bracket is a certain full value speed of wind in MPH that drifts the bullet .1 mil per 100 yards.

For example-

Wind holds for a 338 Lapua with 300gr Berger-

100- .1
200- .2
300- .3
400- .4
500- .5
600- .6
Etc.



Wind holds for a 223 with 77gr TMK-

100- .1
200- .2
300- .3
400- .4
500- .5
600- .6
Etc.



The difference is that the 223 drifts that much with a 4pmh full value wind, the 338 drifts that much in an 8 mph full value wind. This allows one to have the exact same wind call/wind process with every chambering and rifle, the only difference is what wind speed causes the drift.

 

[Formidilosus]

As an aside, there is no comparable system to use MOA the same way.

 

[BCD]

What you see on the stock for wind is for 10mph for anyone that doesn’t understand brackets to use.

A wind bracket is a certain full value speed of wind in MPH that drifts the bullet .1 mil per 100 yards.

For example-

Wind holds for a 338 Lapua with 300gr Berger-

100- .1
200- .2
300- .3
400- .4
500- .5
600- .6
Etc.



Wind holds for a 223 with 77gr TMK-

100- .1
200- .2
300- .3
400- .4
500- .5
600- .6
Etc.



The difference is that the 223 drifts that much with a 4pmh full value wind, the 338 drifts that much in an 8 mph full value wind. This allows one to have the exact same wind call/wind process with every chambering and rifle, the only difference is what wind speed causes the drift.

This is great info! How to I determine the bracket for my caliber and load??

Thank You!!

 

[justin davis]

I use tape on the turret. It’s good out to 600 yards. Makes for fast work

 

[Formidilosus]

Uhhhh, what? Do you actually not understand how wind bracketing works? It’s the exact same process for mils as it is for MOA. What do you think is inherently special with radians to make them work better with wind drift?

Cool. Show your work. What quick, intuitive system works across ALL bulllets and muzzle velocities?

 

[Missahba]

Cool. Show your work. What quick, intuitive system works across ALL bulllets and muzzle velocities?

3 MPH Wind bracket in MOA

Seems pretty simple to me. This is online. Do what works for you.

Calculated --- Rounded for 1/4 MOA Clicks

100 = .18 -----0 clicks (hold a hair)
200 = .35 -----1 click
300 = .54 -----2 clicks
400 = .74 ------3 clicks
500 = 0.96 -----4
600 = 1.19 ----- 5
700 = 1.44 -----6
800 = 1.70 -----7
900 = 1.99 -----8
1000 = 2.29 ----9

 

[Missahba]

If you want to hold in MOA instead of click, wouldn’t you just get a MOA reticle? Instead of Mil dot.

 

[Missahba]

You can do better than that.

 

[lkwoolsey]

I shoot a lot of PRS/ long range stuff (not really while hunting, just in general) so I use a little velcro data patch thing I found on snipers hide. Guy's username is diderr, he sells a nice product. Basically, just a waterproof pvc patch that you attach to the rifle via velcro. Has multiple columns and rows for whatever dope you want. I like it because with a bit of rubbing alcohol you can erase the dope and change it for new loads, different conditions, etc. I keep a log on all my rifles so I just swap out the data when necessary.
Typically, for hunting, I'll have distances out to 700ish yards, in 50 yard increments, along with wind dope for 5 and either 10 or 15mph, again depending on location, ie, colorado vs washington state.
just my .2, hope it helps

 

[RCB]

I zero my rifle to about 250 yards. Then for any shot under 300 yards, I don't really worry about it. For 300 to 350 yards, I've memorized the holdover. I don't shoot beyond 350 yards. It's a simple system. I don't have to carry any additional charts. I don't have to fiddle with a scope before a shot.

 

[Ratbeetle]

Right on!! Thats pretty cool. Funny how people's minds work differently. I find it much easier to remember my 8 mph gun is a .7 hold at 700 yards without looking at a chart than to memorize or count in quarter MOA increments from 0 to 700 to arrive at the 1.75 MOA. So long as it works easier than MILs for you thats all that matters.

Thanks for the explanation.

As an aside.

I hear a lot of guys say they don't dial wind, but on the initial shot I really don't understand why you wouldn't. The typical mil reticle is going to have 1 mil or .5 mil subtensions. How are you holding an accurate .3 mil or .7 mil hold?

If you can spot your shots, I get making a quick wind hold adjustment but it seems more precise to dial wind on the first shot.

I can dial 7 clicks, can't hold .7 mil...precisely anyway.