7mm Mag Trajectory

[THE GOB-FATHER]

Anyone got any info on a 7mm's tragectory with a Federal 150 grain ballistic tip bullet shooting from a Browning Bar II with the BOSS system? I've got it zeroed hittin dead nuts center bull at 100 yards. Just wondering what the drop would be at 200 and 300 maybe even 400?

[THE GOB-FATHER]

Here's the gun:

[Ghost]

Give me a few minutes and I will get it for you. I assume this is a 7mm Win mag. You have a PM please check I need this info.

[Ghost]

This is a 7mm Rem Mag. with a scope

Trajectory (Simplified)
Input Data
Ballistic Coefficient: 0.495 G1 Caliber: 7.000 mm
Bullet Weight: 150.0 gr
Muzzle Velocity: 3025.0 ft/s
Sight Height: 2.00 in Line Of Sight Angle: 0.0 deg
Cant Angle: 0.0 deg
Wind Speed: 0.0 mph Target Speed: 0.0 mph
Temperature: 59.0 °F Pressure: 29.92 in Hg
Humidity: 0.0 % Altitude: 0.0 ft
Std. Atmosphere at Altitude: No Pressure is Corrected: Yes
Zero at Max. Point Blank Range: No Target Relative Drops: Yes
Round Output to Whole Numbers: No
Output Data
Elevation: 3.806 MOA Windage: 0.000 MOA
Atmospheric Density: 0.07647 lb/ft³ Speed of Sound: 1116.5 ft/s
Maximum PBR: 371 yd Maximum PBR Zero: 316 yd
Range of Maximum Height: 177 yd Energy at Maximum PBR: 1818.2 ft•lbs
Sectional Density: 0.282 lb/in²
Calculated Table
Range Drop Drop Windage Windage Velocity Mach Energy Time Lead Lead
(yd) (in) (MOA) (in) (MOA) (ft/s) (none) (ft•lbs) (s) (in) (MOA)
50 -0.5 -0.9 0.0 0.0 2925.6 2.620 2850.3 0.050 0.0 0.0
100 -0.0 -0.0 0.0 0.0 2828.5 2.533 2664.2 0.103 0.0 0.0
150 -0.6 -0.4 0.0 0.0 2733.5 2.448 2488.3 0.157 0.0 0.0
200 -2.4 -1.1 0.0 0.0 2640.6 2.365 2321.9 0.212 0.0 0.0
250 -5.4 -2.0 0.0 0.0 2549.5 2.284 2164.6 0.270 0.0 0.0
300 -9.7 -3.1 0.0 0.0 2460.3 2.204 2015.7 0.330 0.0 0.0
350 -15.5 -4.2 0.0 0.0 2372.8 2.125 1875.0 0.392 0.0 0.0
400 -22.8 -5.4 0.0 0.0 2287.1 2.049 1742.0 0.457 0.0 0.0
450 -31.8 -6.7 0.0 0.0 2203.2 1.973 1616.4 0.523 0.0 0.0
500 -42.5 -8.1 0.0 0.0 2120.9 1.900 1498.0 0.593 0.0 0.0

[Ghost]

You can improve the ballistics by changing th point of impact and get a lot more out of this gun and load. I will demonstrate.

[Ghost]

If you sight the gun in at 0.1 inches high at 30 yards or 3.6 at 100 yrds, you will have a Max Point Blank Zero of 316 yrds and a Max Point Blank Rage of 371 yards . This is all based of of a 8 in target. What MPBR means is that you can hold zero an a 8 in target an hit the vitals out to 371 yards and never adjust for elevation.



Trajectory (Simplified)
Input Data
Ballistic Coefficient: 0.495 G1 Caliber: 7.000 mm
Bullet Weight: 150.0 gr
Muzzle Velocity: 3025.0 ft/s
Sight Height: 2.00 in Line Of Sight Angle: 0.0 deg
Cant Angle: 0.0 deg
Wind Speed: 0.0 mph Target Speed: 0.0 mph
Temperature: 59.0 °F Pressure: 29.92 in Hg
Humidity: 0.0 % Altitude: 0.0 ft
Std. Atmosphere at Altitude: No Pressure is Corrected: Yes
Zero at Max. Point Blank Range: Yes Target Relative Drops: Yes
Round Output to Whole Numbers: No
Output Data
Elevation: 7.246 MOA Windage: 0.000 MOA
Atmospheric Density: 0.07647 lb/ft³ Speed of Sound: 1116.5 ft/s
Maximum PBR: 371 yd Maximum PBR Zero: 316 yd
Range of Maximum Height: 177 yd Energy at Maximum PBR: 1818.2 ft•lbs
Sectional Density: 0.282 lb/in²
Calculated Table
Range Drop Drop Windage Windage Velocity Mach Energy Time Lead Lead
(yd) (in) (MOA) (in) (MOA) (ft/s) (none) (ft•lbs) (s) (in) (MOA)
10 -1.3 -12.0 0.0 0.0 3004.9 2.691 3007.0 0.010 0.0 0.0
20 -0.6 -2.7 0.0 0.0 2985.0 2.674 2967.1 0.020 0.0 0.0
30 0.1 0.3 0.0 0.0 2965.1 2.656 2927.8 0.030 0.0 0.0
40 0.7 1.7 0.0 0.0 2945.3 2.638 2888.8 0.040 0.0 0.0
50 1.3 2.5 0.0 0.0 2925.6 2.620 2850.3 0.050 0.0 0.0
60 1.9 2.9 0.0 0.0 2906.0 2.603 2812.3 0.061 0.0 0.0
70 2.4 3.2 0.0 0.0 2886.5 2.585 2774.6 0.071 0.0 0.0
80 2.8 3.4 0.0 0.0 2867.1 2.568 2737.4 0.081 0.0 0.0
90 3.2 3.4 0.0 0.0 2847.8 2.551 2700.6 0.092 0.0 0.0
100 3.6 3.4 0.0 0.0 2828.5 2.533 2664.2 0.103 0.0 0.0
110 3.9 3.4 0.0 0.0 2809.3 2.516 2628.3 0.113 0.0 0.0
120 4.2 3.4 0.0 0.0 2790.3 2.499 2592.7 0.124 0.0 0.0
130 4.5 3.3 0.0 0.0 2771.3 2.482 2557.5 0.135 0.0 0.0
140 4.7 3.2 0.0 0.0 2752.4 2.465 2522.7 0.146 0.0 0.0
150 4.8 3.1 0.0 0.0 2733.5 2.448 2488.3 0.157 0.0 0.0
160 4.9 2.9 0.0 0.0 2714.8 2.432 2454.3 0.168 0.0 0.0
170 5.0 2.8 0.0 0.0 2696.1 2.415 2420.6 0.179 0.0 0.0
180 5.0 2.6 0.0 0.0 2677.5 2.398 2387.4 0.190 0.0 0.0
190 4.9 2.5 0.0 0.0 2659.0 2.382 2354.5 0.201 0.0 0.0
200 4.9 2.3 0.0 0.0 2640.5 2.365 2321.9 0.212 0.0 0.0
210 4.7 2.1 0.0 0.0 2622.2 2.349 2289.7 0.224 0.0 0.0
220 4.5 2.0 0.0 0.0 2603.9 2.332 2257.9 0.235 0.0 0.0
230 4.3 1.8 0.0 0.0 2585.7 2.316 2226.4 0.247 0.0 0.0
240 4.0 1.6 0.0 0.0 2567.6 2.300 2195.3 0.258 0.0 0.0
250 3.7 1.4 0.0 0.0 2549.5 2.284 2164.5 0.270 0.0 0.0
260 3.3 1.2 0.0 0.0 2531.5 2.267 2134.1 0.282 0.0 0.0
270 2.8 1.0 0.0 0.0 2513.6 2.251 2104.0 0.294 0.0 0.0
280 2.3 0.8 0.0 0.0 2495.7 2.235 2074.2 0.306 0.0 0.0
290 1.7 0.6 0.0 0.0 2478.0 2.219 2044.8 0.318 0.0 0.0
300 1.1 0.4 0.0 0.0 2460.3 2.204 2015.7 0.330 0.0 0.0
310 0.4 0.1 0.0 0.0 2442.6 2.188 1986.9 0.342 0.0 0.0
320 -0.3 -0.1 0.0 0.0 2425.1 2.172 1958.4 0.355 0.0 0.0
330 -1.1 -0.3 0.0 0.0 2407.6 2.156 1930.3 0.367 0.0 0.0
340 -1.9 -0.5 0.0 0.0 2390.2 2.141 1902.5 0.380 0.0 0.0
350 -2.9 -0.8 0.0 0.0 2372.8 2.125 1875.0 0.392 0.0 0.0
360 -3.8 -1.0 0.0 0.0 2355.6 2.110 1847.7 0.405 0.0 0.0
370 -4.9 -1.3 0.0 0.0 2338.3 2.094 1820.9 0.418 0.0 0.0
380 -6.0 -1.5 0.0 0.0 2321.2 2.079 1794.3 0.430 0.0 0.0
390 -7.2 -1.8 0.0 0.0 2304.1 2.064 1768.0 0.443 0.0 0.0
400 -8.4 -2.0 0.0 0.0 2287.1 2.049 1742.0 0.457 0.0 0.0
410 -9.7 -2.3 0.0 0.0 2270.2 2.033 1716.3 0.470 0.0 0.0
420 -11.1 -2.5 0.0 0.0 2253.3 2.018 1690.9 0.483 0.0 0.0
430 -12.5 -2.8 0.0 0.0 2236.5 2.003 1665.8 0.496 0.0 0.0
440 -14.0 -3.0 0.0 0.0 2219.8 1.988 1640.9 0.510 0.0 0.0
450 -15.6 -3.3 0.0 0.0 2203.2 1.973 1616.4 0.523 0.0 0.0
460 -17.2 -3.6 0.0 0.0 2186.6 1.958 1592.2 0.537 0.0 0.0
470 -18.9 -3.8 0.0 0.0 2170.1 1.944 1568.2 0.551 0.0 0.0
480 -20.7 -4.1 0.0 0.0 2153.6 1.929 1544.5 0.565 0.0 0.0
490 -22.6 -4.4 0.0 0.0 2137.2 1.914 1521.1 0.579 0.0 0.0
500 -24.5 -4.7 0.0 0.0 2120.9 1.900 1498.0 0.593 0.0 0.0

[THE GOB-FATHER]

Great info bud! Wow! I'm impressed with the ballistic data! I notice a trend... at 300-320yds is where the "sweet spot" for this rifle seems to be. Am I correct in this theory?

[Ghost]

With the second set up the sweet spot is 4 inches above and 4 inches below your MPBR zero. If you will notice the second set up. Compare the drop on the first set up with a zero of 100 yrds and the second with a zero 0.1 @ 30 yards (Or 3.6 " high at 100).

[Ghost]

remember this is all based off of an 8 in target. Split them in half ( meaning a positive 4 in and a neg. 4 ") Thes is the MPBR (Max Point Blank Range)

[Ghost]

Also look at the 500 yard drop on both set ups

[THE GOB-FATHER]

I'll get some pics of the actual gun, target, and specs of the rifle asap! And btw... the recoil is almost non-existant on this rifle! It's the sweetest shooting rifle I've EVER shot! I'm just overly amazed with EVERY single aspect that this rifle has to offer and right now I'm just blessed to be hunting with it this year!

[THE GOB-FATHER]

Oct 16, 2009 19:02:22 GMT -5 Ghost said:

Also look at the 500 yard drop on both set ups

HUGE difference! Almost HALF the drop wow.

[Ghost]

Its amazing the difference in changing a few numbers can make. Changing the bullet can make even bigger differences. You just hve to play with it and figure oout the best load. Sierra bullets are on of the best out there. But not in all cases. I am getting the best performance out of a Hornady Sp 100 gr out of my .257 Wthby. and my .308 loves Sierra.

[THE GOB-FATHER]

Specs:

Ammunition: 7mm Rem. Mag
Manufacturer: Hornady Ammunition
Ammunition Type: 150 gr. Ballistic Tip

Rifle: Browning Bar II Safari w/ B.O.S.S. chambered in 7mm Magnum
Length of barrel with B.O.S.S.= 24"
Length of barrel w/o B.O.S.S.= 21"
ROT= Unknown?

Scope= Nikon 3.5 x 10 x 50mm

[THE GOB-FATHER]

Btw... the bullets I got with this from a friend at the base of them around the primer... one type says "Frontier" the other says "F C".... um... does that make sense to you?