Here are the latest results for the 12 FV 6.5mm Creedmoor on the morning of Apr 23rd.
Temperatures ranged from 56 to 70 degrees from 8 AM to 11 AM with winds from calm to 3 mph.
All shots were at 100 yards with IMR4451 Enduron powder, Lapua Brass, and CCI BR-4 small rifle primers using a Sinclair F-Class Gen 3 bipod and a Protecktor rear rest from a bench.
I shot all the rounds with the action screws torqued to 35 in.-lbs. to verify if the last test remained valid.
The Berger 140 grain #22401 Match bullets shot better at this session, so I presume the shooter was the cause of the poor showing that bullet's last session.
Description shows powder and charge, O.A.L., trim length, exit time and temperatures loaded for and shot at.
The 1.361 exit time is at the 12th reflection of the shock wave at the chamber for the 26 inch 3% carbon steel Savage barrel.
# Grps |
Load Description |
Bullet |
Weight |
Velocity |
Average |
Median |
St Dev |
1 |
2 |
3 |
4 |
3 |
IMR4451 38.9 gr 2.815 1.911 wf 1.361 * 58/56 deg F. |
Hornady Match # 26177 |
130 |
2698 |
0.391 |
0.398 |
0.046 |
0.398 |
0.342 |
0.433 |
|
3 |
IMR4451 38.7 gr 2.813 1.908 wf 1.361 * 63/60 deg F. |
Hornady Match # 26331 |
140 |
2665 |
0.318 |
0.320 |
0.028 |
0.289 |
0.320 |
0.345 |
|
3 |
IMR4451 38.7 gr 2.812 1.909 wf 1.361 * 65/65 deg F. |
Berger Match # 26401 |
140 |
2663 |
0.378 |
0.278 |
0.189 |
0.260 |
0.278 |
0.596 |
|
4 |
IMR4451 38.5 gr 2.810 1.907 wf 1.361 * 68/68 deg F. |
Hornady Match # 26333 |
147
|
2638
|
0.410
|
0.433
|
0.057
|
0.326
|
0.432
|
0.433
|
0.449 |
13 |
# groups |
|
|
|
0.377 |
0.345 |
0.092 |
|
|
|
|
Here is an update on the performance at the two different torque settings.
Only the 35 in-lbs. torque was shot at this range session.
Torque on Action Screws |
Avg |
Median |
St Dev |
# Gps |
35 In.-Lbs. |
0.378 |
0.374 |
0.075 |
43 |
45 In.-Lbs. |
0.438 |
0.456 |
0.071 |
12 |
Overall Average |
0.392 |
0.393 |
0.079 |
55 |
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