If you read my first articles on my Browning X-Bolt Speed, I was eager to shoot some Nosler 175g ABLR’s in my new rifle. I had hoped they would group well for long range moose hunting even with 9.5 twist rate.
This week I shot several rounds. Initial groups were just over 1 inch. The X-Bolt Trigger set by the factory at 4 lbs. is a bit too stiff for me, and a pain to try to adjust. I will shoot more this next week. I did shoot a single “cold bore” at 100 yards and then moved the target to 150 yards and shot “cold bore” again with the 100 yard zero. I expected the bullet to drop a bit. It fell only one inch, as expected. Nice! This initial testing with 175g was very encouraging.
I hand loaded the bullet with Reloader 22 at 62 grains, (COL 3.24), giving a published estimate of over 2900 fps with a 24 inch barrel. The X-Bolt has a 26 inch barrel. I estimate a 50 fps improvement but will chrono some next week for real data.
Below is the JBM ballistic chart for this bullet if it’s muzzle velocity was 2950 fps. Energy at 600 yards is over 1800 ft-lb and velocity is over 2100 fps. Recoil is 24 ft-lbs. Felt recoil is much less, maybe half, with the great recoil pad on this rifle.
Very impressive start!
| Trajectory |
| Input Data |
| Manufacturer: |
Nosler |
Description: |
Accubond Long Range Spitzer (G7) |
| Caliber: |
0.284 in |
Weight: |
175.0 gr |
| Ballistic Coefficient: |
0.364 G7 (ASM) |
|
|
|
| Muzzle Velocity: |
2950.0 ft/s |
Distance to Chronograph: |
0.0 ft |
|
| Sight Height: |
1.50 in |
Sight Offset: |
0.00 in |
| Zero Height: |
0.00 in |
Zero Offset: |
0.00 in |
| Windage: |
0.000 MOA |
Elevation: |
0.000 MOA |
| Line Of Sight Angle: |
0.0 deg |
Cant Angle: |
0.0 deg |
|
| Wind Speed: |
10.0 mph |
Wind Angle: |
90.0 deg |
| Target Speed: |
0.0 mph |
Target Angle: |
90.0 deg |
| Target Height: |
40.0 in |
|
|
|
| Temperature: |
40.0 °F |
Pressure: |
29.92 in Hg |
| Humidity: |
50 % |
Altitude: |
0.0 ft |
|
| Vital Zone Radius: |
5.0 in |
|
|
|
| Std. Atmosphere at Altitude: |
No |
Pressure is Corrected: |
Yes |
| Zero at Max. Point Blank Range: |
No |
Target Relative Drops: |
Yes |
| Mark Sound Barrier Crossing: |
No |
Include Extra Rows: |
No |
| Column 1 Units: |
1.00 in |
Column 2 Units: |
1.00 MOA |
| Round Output to Whole Numbers: |
No |
|
|
| Output Data |
| Elevation: |
3.400 MOA |
Windage: |
0.000 MOA |
|
| Atmospheric Density: |
0.07925 lb/ft³ |
Speed of Sound: |
1095.8 ft/s |
|
| Maximum PBR: |
370 yd |
Maximum PBR Zero: |
313 yd |
| Range of Maximum Height: |
171 yd |
Energy at Maximum PBR: |
2348.1 ft•lbs |
|
| Sectional Density: |
0.310 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) |
| 0 |
-1.5 |
*** |
0.0 |
*** |
2950.0 |
2.692 |
3381.0 |
0.000 |
0.0 |
*** |
| 25 |
-0.7 |
-2.8 |
0.0 |
0.1 |
2915.4 |
2.661 |
3302.2 |
0.026 |
0.0 |
0.0 |
| 50 |
-0.2 |
-0.4 |
0.1 |
0.2 |
2881.0 |
2.629 |
3224.8 |
0.051 |
0.0 |
0.0 |
| 75 |
0.0 |
0.0 |
0.2 |
0.3 |
2846.8 |
2.598 |
3148.6 |
0.078 |
0.0 |
0.0 |
| 100 |
-0.0 |
-0.0 |
0.4 |
0.4 |
2812.8 |
2.567 |
3073.8 |
0.104 |
0.0 |
0.0 |
| 125 |
-0.3 |
-0.2 |
0.7 |
0.5 |
2779.0 |
2.536 |
3000.3 |
0.131 |
0.0 |
0.0 |
| 150 |
-0.9 |
-0.6 |
1.0 |
0.6 |
2745.3 |
2.505 |
2928.1 |
0.158 |
0.0 |
0.0 |
| 175 |
-1.7 |
-0.9 |
1.3 |
0.7 |
2711.9 |
2.475 |
2857.3 |
0.186 |
0.0 |
0.0 |
| 200 |
-2.9 |
-1.4 |
1.8 |
0.8 |
2678.7 |
2.444 |
2787.7 |
0.213 |
0.0 |
0.0 |
| 225 |
-4.4 |
-1.8 |
2.3 |
1.0 |
2645.7 |
2.414 |
2719.4 |
0.242 |
0.0 |
0.0 |
| 250 |
-6.1 |
-2.3 |
2.8 |
1.1 |
2612.9 |
2.384 |
2652.4 |
0.270 |
0.0 |
0.0 |
| 275 |
-8.2 |
-2.9 |
3.4 |
1.2 |
2580.3 |
2.355 |
2586.6 |
0.299 |
0.0 |
0.0 |
| 300 |
-10.6 |
-3.4 |
4.1 |
1.3 |
2547.9 |
2.325 |
2522.1 |
0.328 |
0.0 |
0.0 |
| 325 |
-13.4 |
-3.9 |
4.8 |
1.4 |
2515.8 |
2.296 |
2458.9 |
0.358 |
0.0 |
0.0 |
| 350 |
-16.5 |
-4.5 |
5.6 |
1.5 |
2483.8 |
2.267 |
2396.9 |
0.388 |
0.0 |
0.0 |
| 375 |
-19.9 |
-5.1 |
6.5 |
1.7 |
2452.1 |
2.238 |
2336.1 |
0.418 |
0.0 |
0.0 |
| 400 |
-23.7 |
-5.7 |
7.4 |
1.8 |
2420.7 |
2.209 |
2276.5 |
0.449 |
0.0 |
0.0 |
| 425 |
-27.9 |
-6.3 |
8.5 |
1.9 |
2389.4 |
2.180 |
2218.1 |
0.480 |
0.0 |
0.0 |
| 450 |
-32.5 |
-6.9 |
9.5 |
2.0 |
2358.4 |
2.152 |
2160.9 |
0.512 |
0.0 |
0.0 |
| 475 |
-37.4 |
-7.5 |
10.7 |
2.2 |
2327.6 |
2.124 |
2104.8 |
0.544 |
0.0 |
0.0 |
| 500 |
-42.8 |
-8.2 |
11.9 |
2.3 |
2297.0 |
2.096 |
2049.9 |
0.576 |
0.0 |
0.0 |
| 525 |
-48.5 |
-8.8 |
13.2 |
2.4 |
2266.7 |
2.069 |
1996.2 |
0.609 |
0.0 |
0.0 |
| 550 |
-54.7 |
-9.5 |
14.6 |
2.5 |
2236.6 |
2.041 |
1943.5 |
0.642 |
0.0 |
0.0 |
| 575 |
-61.3 |
-10.2 |
16.1 |
2.7 |
2206.8 |
2.014 |
1892.0 |
0.676 |
0.0 |
0.0 |
| 600 |
-68.4 |
-10.9 |
17.7 |
2.8 |
2177.2 |
1.987 |
1841.6 |
0.710 |
0.0 |
0.0 |
|
|
|
More to come…
