We've been having a discussion about PDWs here:
I am just quickly posting my proposal, which is to use the Belgium VBR PDW with a cartridge that is a .460 Rowland necked down and shortened to accept this bullet: 7mm PDW
Which gives me these ballistics at 305 MPa pressure. Decent chance to hit somebody @ 150m and supersonic suppressive fire out to ~350m
Tabular trajectory data at Std.ICAO Atmosphere
-------------------------------------------------------------------------------------
Gun / Ammunition : 7 mm PDW - 45 Rowland
Bullet : 7 mm PDW
Bullet weight : 73 grains or 4.73 Grams
Muzzle velocity : 631 m/s
Crosswind speed : 4 m/s
Ballistic Coefficient(s) (G1):
C1=0.250@V>680 m/s;
C2=0.240@V>510 m/s;
C3=0.230@V>340 m/s;
C4=0.180@V>170 m/s;
C5=0.160@V>0 m/s;
Optimum trajectory information :
Optimum sight-in range (X) = 102 m
with max. ordinate above LOS at range (M)= 63 m
and max. point blank range (P)= 117 m.
-------------------------------------------------------------------------------------
Sight-in clicks, 1 click = 1.0 cm/100 m or 0.394 in/100 m
Height of sight above bore axis = 3.175 cm or 1.25 inch
Gun is zeroed-in at 100 m,
by sighting-in at level firing
-------------------------------------------------------------------------------------
Range Velo Time of Energy Path Deflection Total Sight correction Target
city flight to at crosswind drop for setting new lead
LOS of 4.5 m/s zero range 10 m/s
-------------------------------------------------------------------------------------
·Meter m/s s Joule cm cm MOA cm Clicks MOA m ·
-------------------------------------------------------------------------------------
| 0 631 0.0000 941 -3.2 0.0 ----- 0.0 ------ ----- 0.00
| 25 604 0.0400 863 +0.3 0.2 0.25 0.8 -1.3 -0.43 0.40
| 50 578 0.0819 790 +2.2 1.2 0.81 3.2 -4.3 -1.49 0.82
M 62 566 0.1029 756 +2.4 2.1 1.16 5.0 -3.9 -1.33 1.03
| 75 552 0.1264 722 +2.1 3.4 1.54 7.5 -2.8 -0.97 1.26
X 100 528 0.1733 660 0.0 6.6 2.27 13.9 0.0 0.00 1.73
P 116 513 0.2044 622 -2.5 9.2 2.72 19.1 +2.2 +0.75 2.04
| 125 504 0.2223 601 -4.4 10.8 2.97 22.5 +3.5 +1.20 2.22
| 150 481 0.2732 546 -11.1 15.8 3.63 33.5 +7.4 +2.54 2.73
| 175 458 0.3260 495 -20.3 21.7 4.27 46.9 +11.6 +3.98 3.26
| 200 436 0.3815 450 -32.4 28.8 4.96 63.3 +16.2 +5.57 3.82
| 225 416 0.4405 409 -48.0 37.5 5.73 83.2 +21.3 +7.33 4.41
| 250 397 0.5022 373 -67.2 47.4 6.51 106.6 +26.9 +9.24 5.02
| 275 380 0.5664 341 -90.1 58.4 7.30 133.8 +32.8 +11.26 5.66
| 300 364 0.6337 313 -117.4 70.7 8.11 165.4 +39.1 +13.46 6.34
| 325 350 0.7038 290 -149.4 84.3 8.92 201.7 +46.0 +15.81 7.04
| 350 337 0.7766 269 -186.4 99.2 9.74 242.9 +53.3 +18.31 7.77
-------------------------------------------------------------------------------------
M = Peak vs. L.O.S, X = Set Zero, P = Max. Point Blank Range
Elevation above Angle of Site (0.0 deg.) = 0.0977 deg.
Monday 17 June 2013
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment