Accessories Round MilDot calculator

[truck1]

Mine arrived today. Honest seller. Played with it a little and it seems well made, and designed. Seems accurate. Looking forward to some long distance ranging and comparisons to my laser rangefinder. Thanks mluha !

 

[mluha]

Thank you guys: the offer 50% discount against a public review is now over. I have received many good suggestions and hopefully they will be made public also. It will take some time to process them all and update the current design. I will keep you posted in this thread about the progress.

 

[hiddenmongoose]

I recieved my round Mildot calculator from Mattias in early Dec 2018 and have used it in 2 Military Shoots/Exercise and several civilian shooting days. I have been in contact with him regarding some observations good and bad and he has taken some points on board for review.
I own a mildot master and have used it for years so wasnt quite sure what this could offer but to be honest I prefer the round mildot calculator to the mildot master.
here is a few observations I made.

The issue with the math on angle fire for the metric version I am told is being resolved.

The formula they are using for angle firing is the cos of the angle multiplied by the range(same as for the mildot master) this is known as the riflemans rule. So as you can see on the pic above the tgt is 800m away and the corrected distance we are given for a 50 degree shot is 560m. This is incorrect as cos of 50 equals 0.6427876097 .... multiplied by range of 800 should equal 514.23 meters. So it is 46 meters off. By comparrason a mildot master will give you a read out of 515meters so bang on.
Overall it is a solid, well built , rugged, easy to read calculator. I find it is easier to read than the mil master and that there is no '' inner card'' to fall out. However it does have its drawbacks, especially in a mil/leo setting as listed above.

 

[mluha]

Thank you for the review: I discounted the current lot of calculators down, as you are correct: the angles do not match. I increased the range of the calculator from 1000m to 1200m and forgot to change the angle marks. Extremely embarrassing. It will take time before the new lot comes out. Whenever it is made I will post it here.

 

[Mr.BR]

In regards to target size , the 10-100cm span was chosen to offer more resolution in competion enviroment , but even in Mil/LE eviroment , typical measurement system for quick ranging stadia used in reticles is 0.5m x 1m .

Definetly agree on mil wheel needing more purchase , for gloved operation , i would suget making the the edge slightly tothed to get some traction while still keping the production simple.

 

[surprise]

Unfortunately I haven’t had much of a chance to take it out and play with it on the range, but testing it in the house I definitely feel the wheel needs something to give it more traction, it is extremely challenging to rotate!

 

[mluha]

 

[mluha]

Would something like above be useful?
On the left: 100cm target size MIL reading at different ranges.
On the right: 1.5 MIL compared to human figure at different ranges.

 

[Alpine 338]

Yes, except for the scale on the right in red. It would not be accurate, and cause confusion. The 100 cm or 1-Meter method is the one most people use and understand when estimating distance of a human target. Another proven method is to measure the shoulder width (50 cm).

I would also add a column with distances in yards. Some people cannot comprehend Meters, or understand the easy conversions.

 

[mluha]

Hello!
I am working on the new design of the US/Imperial RoundMildDot calculator. I have received a lot of good suggestions and I will try to implement them as much as I can. Probably this will mean that there will be many alternative products available (making the purchase process a bit harder, but hopefully more rewarding).
Here are the suggestions I should but on the back side of the calculator:

A) Type E and F Targets
B) The following IPSC targets: (1) 100 % or Full; (2) 66% or 2/3; (3) 50% or 1/2; (4) 33% or 1/3

C) Human (Adult) 68"" tall, crotch to top of head 40"", width of shoulders 19"", and width of head 6""
D) Dog (Shepherd): height 24'', width 28''

E) Land Rover, 90 and 110 series
F) Jeep* 71"" in height
G) Mercedes Benz G-Wagon

H) Fuel Can

I) Exterior Doorway* 80"" in height
J) Average window size. Seems complicated, as there are so many variations. Doorway is more accurate.
K) 10 bricks with 3/8'' joint: 80.3 X 26.4'' and 83.8 X 26.4''.

L) Traffic signs:
Stop: Single Lane 30x30'', Multi-Lane & Expressway 36x36'', Oversized 48x48''
Yield: Single Lane 36X36X36'', Multi-Lane & Expressway 48x48x48'', Freeway 60x60x60''
Speed Limit: Single Lane 24x30'', Multi-Lane & Oversized 30x36'', Expressway 36 X 48ää, Freeway 48X60''
Squared prohibition signs: Single or Multi-Lane: 24X24'', Expressway 30x30 or 36x36''; Freeway and Oversized: 36x36 or 48x48''.
Round prohibitions signs: Single or Multi-Lane: d=18'', Expressway: d=24''; Freeway and Oversized: d=30''
Source: https://mutcd.fhwa.dot.gov/htm/2009/part2/part2b.htm

M) Make an alternative version with the back side blank white so users can draw their own dimensions/tgts or make a waterproof circular sticker for sale which the user can attach over the rear and draw on themselves, replacing as needed.

Does anyone has any good suggestions what to add or what to leave out?

Thank you!
Mattias

 

[Alpine 338]

I would not use J, K, or L.

Alternative option of being blank is a very good idea. Especially if it's a surface that is white or light grey, and you can write on it, and erase it.

 

[mluha]

I received the first sample of the new version of the RoundMilDot: please see photos. I added "trackion-slots" to the front where you can place yor thumb and grids to the back side for rotating the slide ruler. Any suggestions or comments please?
I will do alternative version, where one side is squared - let's call it he "slope-version". This squared side will help with the angle determination.(On the photos there is no print on the back side yet)
Front side:

Back side:

 

[mluha]

PS. I added MIL = MOA indicator also to the calculator. Marked with red here:

 

[mluha]

This is the initial version on back side with a sticker: the idea is that users can draw their dope charts on the sticker. The stickers are replaceable. For example 5 stickers would come with each calculator. What do you think? Any suggestions?

 

[sinister]

Very nice! The US Army-style silhouette targets on the bottom are not labeled correctly. The shorter half-Meter target on the lower left is an "F" while the taller 1-Meter target in the lower center is an "E"

 

[Alpine 338]

This is the initial version on back side with a sticker: the idea is that users can draw their dope charts on the sticker. The stickers are replaceable. For example 5 stickers would come with each calculator. What do you think? Any suggestions?

Looks good, but I wouldn't worry about the zone areas on the targets, because realisticly you won't see them, and most people shoot steel vs. cardboard in precision rifle. Also, E-Type target is the larger of the two, where you have it incorrectly reversed with the F-Type target.

 

[mluha]

Thank you! "F" and "E" has been pointed out before: I corrected it now.
Anything else you would like to see there?

 

[mluha]

Anything to add or correct on this one?

 

[Alpine 338]

Without it in hand, I think your dope chart may have too small of blocks to write in. You show it as 8-wide, 20-tall. I would do 6 x 15 at a minimum.

I really like how you laid out all the other target sizes.

 

[sinister]

Remove the vehicles and replace with (horizontal):

AK
PKM
RPG-7

 

[mluha]

Thanks!
Probably the only useful information for AK, PKM and RPG is the total length of the weapon? If so, then I can probably fir them to the right.

6X15 grid is a good idea: the way they are now is writable, but with very sharp marker.

 

[mluha]

Thank you, especially Alpine338 - this design mostly follows recommendations you made during the testing.
Here is the modified version with weapons lengths also. Looks good to me! Anyone has some more comments or correction please?

 

[sinister]

If anything I'd replace G-Wagon or Jeep with Hi-Lux and Bongo van -- more likelihood of seeing targets in those in poor 3rd World.

Jeeps/Jeepnies if fighting in the Philippines. Whatever the most common sedan/taxi is, world-wide (maybe Toyota or Mercedes?).

Will you be able to put data in the grids using 5mm pencil?

 

[mluha]

Hi! You are probably right about the Hi-Lux...

I added 2 most common US traffic signs, but I am not sure, if this is actually something that should be there?

 

[sinister]

I think it's starting to have too much. Perhaps a typical house door (height-width) instead?

 

[Alpine 338]

I think it's starting to have too much. Perhaps a typical house door (height-width) instead?

This is made for the North American Continent (US/Canada) with Imperial values. 90% of door heights throughout US, Canada, UK, Australia, NZ are 80". However, widths can very +/- as much as 10"
Vehicles common in North America are Jeep, G-Wagen, and LR Defender.

Unless you're watching Red Dawn, or on military training range, you most likely will never run into any RPG's.

If in an environment where you will encounter HiLux vehicle's, RPG's, MTB's, etc, you would be running the Metric version. Most of the world outside the US has gone to metric.

 

[sinister]

Then use metric measurements as most scopes now use mil-ranging dot or tic/hash systems. Maybe G-Wagen and Rovers common in Canada? US -- probably more F-150/1500, 250/2500, 350/3500 pickups.

Replace the AK with M4 and M16 (Carbine and full-length rifle -- probably the most popular rifle in the US). Drop the PKM and RPG. Remove the soldier as a range reference -- unless you think the users are going to be shooting at cops and soldiers.

 

[mluha]

The new version of the Round MilDot calculator is finally out: https://roundmildot.com/product/roundmildot-us-imperial-calculator-with-dope-card-sticker-a-grade/

This calculator has nothing printed on the back side: the back side is white. It comes instead with 10 back-side stickers where you can write your personal DOPE card information. If you change the ammo or the sticker wears off, you can just use a next sticker.
The sticker also has exact measures of most common targets (IPSC ja IDPA) and other objects like cars, weapons and traffic signs. I am not 100% sure if the traffic signs sizes are all the same in all states, but they should be correct in most cases.

I also added thumb slots to the front of the calculator for better grip - this is especially useful while working with gloves.

I had a bit of trouble in finding the balance between all the suggestions I received on how to make the calculator better - I hope the new version is a good compromise and will be well received.
If you find any mistakes or have good suggestions how to make it even better please e-mail me: [email protected]
Mattias Luha