n-DOPE and MEMA - Calculating how much Environmentals Effect Firing Solutions

[TheOtherAndrew]

How much do Environmentals Effect Firing Solutions?

Read attached file, do you agree/disagree? Did I overlook something? Or is this solid info others have also noticed...?
n-DOPE is DOPE normalized to 70deg/2000DA (middle of the road).
MEMA is margin of error in minutes of angle - and if you are sub 1.5 you are accurate enough to be hitting majority of PRS style plates IMO.

 

[_Windrider_]

I dont think any of this is disputable. These observations are why people hold High when its cold and hold low when its hot. PRS comps arent inherently difficult in the target size. the difficulty is the time pressure, following the steps to get a hit. reading the wind properly etc etc. obviosly the smaller the target the less margin of error there is. but on a full size IPSC, there is a big margin compared to a small diamond.

This will allow for accuracy, but not precision. youll hit your target, but will you hit it where you aimed or somewhere else and does it matter? sometimes it does, sometimes it doesnt.

 

[TheOtherAndrew]

98% agree TD,

1) But if you use non-normalized DOPE (if the data comes from a semi-extreme environment one way or another) then the +/- 1 click (or hold high/low) trick may not work for different locations.

2) I think that given factory ammo is not always sub MOA, and entry level guns are roughly .75-1.25MOA - 1MOA margin of error is close to the highest level of precision that system will allow and therefore it is rather precise. Other gun/ammo systems are way better and more precise and in that case (say a 1/3MOA gun/ammo system) 1 or 1.5 MEMA would be considered not precise.

Really just some nitpicking that Im sure you already knew; overall agree.

 

[_Windrider_]

98% agree TD,

1) But if you use non-normalized DOPE (if the data comes from a semi-extreme environment one way or another) then the +/- 1 click (or hold high/low) trick may not work for different locations.

2) I think that given factory ammo is not always sub MOA, and entry level guns are roughly .75-1.25MOA - 1MOA margin of error is close to the highest level of precision that system will allow and therefore it is rather precise. Other gun/ammo systems are way better and more precise and in that case (say a 1/3MOA gun/ammo system) 1 or 1.5 MEMA would be considered not precise.

Really just some nitpicking that Im sure you already knew; overall agree.

Most competitive shooters are using hand loads and custom rifles. I think the biggest variance in drop data that is rarely accounted for properly, even more so than changes in DA, is temp variation on MV (which you account for). Most newer shooters don’t know this because they don’t track MV variations across multiple temp ranges to calculate the change.

 

[_Windrider_]

But I do like what you did. Always good to do critical thinking exercises.