Best Spin Drift online calculator?

[dfanonymous]

So until this year the Kestrel 5700 and earlier used Applied Ballistics (AB) programming for there engine. Then Hornady's 4 Degrees of Freedom (4 DOF).

Ad farra as I know about the only difference between the two is that 4 DOF corrects for bullet attitude (angle of attack in relation to the trajectory).

Is this "IT"? Is this the main or only difference between AB and 4 DOF?

Eric B.

Applied ballistics accounts for aerodynamic jump.

Hornady uses Axial Form Factor to adjust the calculations to match your real world results. AB uses MV Calculation and DSF. Different methods but both make the adjustments necessary to fine tune the computed results to your rifle's performance.

I stick with ways I know work, so MV and DSF is for me, but it doesn't matter for the average shooter unless you are pushing subsonic. This is the reason Capt up there doesn't notice any issues, his 7mm mag is still screaming even at 1400. Start shooting in mile(s) range with assorted bullets and loads then this stuff becomes important, including spin. Not at 1000.

 

[dfanonymous]

Also I'm not sure about this but last thing but I heard from our kestrel liaison, 4 dof kestrels were exclusively under the limits of the sportsman series, which is fine if you don't mind not having the range cards and are limited to 3 guns. You can store more gat pieces on the app. If that hasn't changed then still not really a big deal.

 

[Danehunter]

df, Good to know re. the Kestrel 4 DOF engine. Quite limited options in the Sportsman Kestrels.

Eric B.

 

[Doug Herold]

Buy the STRELOKPRO APP, I have about 20 apps to include AP ballistics and all the popular ones and through my testing in the past three years STRELOKPRO is the most consistent and scalable!

The problem I have with Strelok is that I cannot input elevation (which equates to air density)

 

[Mram10us]

I read earlier about needing an accurate compass. As you know, most cell phones have this, so no need to carry something else. At 1500 yards, if you shoot at a heading of 100 but it's off by 5 degrees, your shot is off by .1".

 

[User4302021]

The problem I have with Strelok is that I cannot input elevation (which equates to air density)

What is the advantage to putting in a fixed elevation, when it is irrelevant?

If you want to put in a fixed number, all you would have to do is put in standard station pressure for that altitude. Even if you don't have a chart, it is 29.92inHg at sea level and subtract 1inHg per 1,000 ft. elevation.

Pretty simple.

 

[BrentM]

I read earlier about needing an accurate compass. As you know, most cell phones have this, so no need to carry something else. At 1500 yards, if you shoot at a heading of 100 but it's off by 5 degrees, your shot is off by .1".

I don't think it's off by any amount with a 5 degree deviation. Not that I can see when running simulations on an app and not when shooting. The phone compass should be more than enough. Heck i just use the compass data inside my sig 2400 or just swag the heading into an app.

 

[Tucker65]

The problem I have with Strelok is that I cannot input elevation (which equates to air density)

Strelok Pro let's you use the phones built in barometer or you can enter your own density altitude numbers.

 

[BrentM]

Strelok Pro let's you use the phones built in barometer or you can enter your own density altitude numbers.

Phones have a barometer?

 

[Rangerbear]

I always used shooter app. It worked great for me.