.45GAP: Vihtavuori Lapua N340
Disclaimer: The powder charge information (in black) was taken from gun powder companies, gun powder distributors, and/or published handloading data (paper and/or electronic) to the best of my knowledge – not responsible for typos; Always refer to published official handloading data for verification.
Pressures may differ significantly due to component variations and whether a test barrel or an actual pistol was used for testing purposes. I am not responsible for your actions. Powder charges that are too light or too heavy can both cause pressure problems. Use your own common sense. If you wish to use any of the following data, use at your own risk! You are responsible for your own actions.
WARNING: Red lettered data in charts refers to loads that have not been officially pressure checked and may be beyond maximum pressure limits --- extreme caution required.
Glock 37 (4.5” barrel)
West Coast 200 gr. Jacketed Round Nose bullet
42 Degrees during Chronograph testing (Pact Mark IV)
Overall cartridge length: 1.074”
Winchester small pistol primer
The data is based on 4 to 6-shot samples (throwing no data out as fliers, although some did not register)
|
Grains N340 |
FPS |
FPE |
Power Factor |
Extreme Spread |
Standard Deviation |
Notes |
|
5.2 |
- |
- |
- |
- |
- |
Failed to read on chrony |
|
5.4 |
738.9 |
242.55 |
147.79 |
54.8 |
23.5 |
USPSA Minor Power Competition Level (min. 125) |
|
5.6 |
789.7 |
276.98 |
157.93 |
67.1 |
26.6 |
|
|
5.8 |
851.8 |
322.28 |
170.35 |
45.1 |
15.4 |
|
|
6.0 |
877.1 |
341.73 |
175.42 |
25.8 |
9.5 |
USPSA Major Power Competition Level (min. 165) |
|
6.2 |
932.3 |
386.11 |
186.46 |
48.0 |
20.0 |
|
|
6.4 |
972.5 |
420.08 |
194.49 |
43.2 |
14.4 |
Duplicate of Speer Lawman 200 Gr. (Hot – beware) |
|
6.6 |
993.3 |
438.28 |
198.66 |
30.2 |
13.4 |
|
|
6.8 |
1013.5 |
456.32 |
202.71 |
24.3 |
11.8 |
|
|
7.0 |
1047.0 |
486.93 |
209.40 |
67.6 |
26 |
|
Red = Danger: Individually worked up loads; Red lettered charges have not officially been pressure checked out of a Glock G.A.P. pistol!
As a Vihtavuori Reloading Guide .45 ACP comparison (6 inch barrel): 6.2/906 fps to 6.8/986 fps
Contributed by Kestrou of www.glocktalk.com Bull Dawgs Club
safety, safety, safety
.45GAP (.45 GAP) Caliber Page; Document Version 03/27/06