Help needed for trajectory and windage

[wildcat westerner]

Help,
I am a "doophus" mathematically. I will be going to Whttington the end of August and testing a new barrel for my wildcat rifle in .308 with the 212 grain Hornady ELDX bullet. Although I saw my last patient 17 years ago and am retired, I needed two people to help me pass my undergrad math equivilency and it took three times to get that accomplished.

I can get none of the ballistics calculators to work properly because I must be entering incorrect data.

is there someone out there who would be willing to help me in this matter?

Here are my specs: The wildcat I designed had 84.4 grains of water capacity. (approximately 308 Norma magnum) It is necked down from .366 to .308
The bullet I shall be testing is the Hornady .308 212 ELDX G7 is .337
Barrel length is 28 inches- velocity should be 2,900 -3,000 fps.
scope height 1.5
wind speed at 90 degrees 1mph, as per Brian Lizst
trajectory zero 200 yards
trajectory increments 100 yard intervals to 1,200 yards

I have wasted enough time on this , in my near total ignorance.

Much thanks to anyone who can provide me with the beginning data

 

[Taylorbok]

twist rate?
also you want mils or MOA?

What calculator you trying to use? Thy are pretty simple IMO

 

[308win]

What exactly is the question/issue?

 

[Taylorbok]

What exactly is the question/issue?

if I understand correctly he just wants someone to provide him a dope card

 

[308win]

I guess I'm confused? Without a velocity (I guess we could plug in 2950?) this is going to be hard to do. Also question the scope height of 1.5? That's usually the default scope height on most programs? How does the OP know his calculations are incorrect without any actual data?

 

[Taylorbok]

I guess I'm confused? Without a velocity (I guess we could plug in 2950?) this is going to be hard to do. Also question the scope height of 1.5? That's usually the default scope height on most programs? How does the OP know his calculations are incorrect without any actual data?

I was gonna use 2950. Yes 1.5 is suspect but not overly important.
Really we should have enviro also but I was just gonna ball park it.

My guess was he just wanted some rough data to try and get on steel. Probably be close enough to get a hit if he can spot the miss. But I never really thought about how does he know his dope is wrong

 

[K.E.C.]

What is your Elevation.

 

[Taylorbok]

What is your Elevation.

Google told me they at 6300 feet

 

[Beluebow]

I've been using this app lately. I like it. Eagleman app

 

[wildcat westerner]

Thank you all, and I shall try to answer your questions. I chose 2,900 fps for the 28 inch barrel with its 1-10 twist because i think it would be an attainable, high pressure load for the 212 gr. ELDX. The rifle is at the gunsmith and I simply chose that scope height because its pretty well standard for most applications. If I can gain some trajectory data that is reasonably accurate it would make it much more convenient as I move back on the berms to have the point of impact somewhere near centered on the target. Windage: this will be interesting with this high BC bullet and I have never seen the 1,000 yard range where there was not wind of some kind. - The day before will be spent at the Coors range evaluating exactly which powder provides best velocity/accuracy. Sighted in for 200 and with potential drop data evaluation, it would make the movements backwards on the berms much more efficient without wasting a lot of ammo at each distance. 6,300 elevation sounds right for Whittington.

Thanks in advance

 

[Taylorbok]

mils or MOA?
You aren't going to be anywhere near "centered" with the amount of guesses you are requiring us to make.
Really a ballistic app requires you to enter about 10 numbers it shouldn't be hard

 

[Taylorbok]

Here's some numbers to get you in the ball park.
that's a 10 mph wind from 9 o'clock.

Range Card
Range	Elevation	Windage
(y)	(moa)	(moa)
100	-1.17	0.37
200	0	0.71
300	1.92	1.07
400	4.13	1.45
500	6.53	1.84
600	9.1	2.24
700	11.85	2.67
800	14.77	3.11
900	17.89	3.57
1000	21.2	4.04
1100	24.73	4.54
1200	28.49	5.07

 

[wildcat westerner]

Taylorbok,

Huge thanks for what was almost certai9nly easy for you. According to your specs the 212 grain ELDX only drifts 5+inches at 1,200 yards in a 10 mph wind! Lord, that almost seems to violate known rules of physics!

 

[bigngreen]

The chart is in MOA so it's just over 63 inches of drift at 1200 if I did my math right.