Zak Smith
Member
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Data from VV1 book, as republished by LoadBooks. Fired at 5000'
elevation, 55F, sunny, windy. CZ-75B-SA. Control GECO 124gr 9mm:
1116 fps. All loaded with Dillon Square Deal B.
WARNING: Loads didn't blow up my gun, but might blow up yours. Use at
your own risk. All of these are below the MAX published in the VV1
book. Always start at 10-15% below MAX and follow the directions in a
loading manual.
Data is listed:
[powder] [amount] <[expected velocity]> [actual avg. velocity] ([std dev]) notes...
Five shots were fired each point to compute average velocity and
standard deviation. Expected velocities were computed by linearizing
the two points given in VV1 for each load and then interpolating.
90gr Gold Dot, OAL= 1.060 - 1.065", new Starline cases, WSP
N320 5.7gr <1413> 1476 (18.5) notes: all were a bit flat, but not "flattened"
N320 5.9gr <1450> 1495 (10.7) notice about +50 fps over published values
N320 6.1gr <1486> 1532 (13.6)
N320 6.3gr <1522> 1562 (11.6)
3N37 8.0gr <1503> 1450 (13.7)
3N37 8.2gr <1531> 1471 (13.9)
3N37 8.4gr <1558> 1502 (15.0) notice about 50fps under published values
3N37 8.6gr <1585> 1558 (11.1)
3N37 8.8gr <1613> 1563 (16.0)
3N37 9.0gr <1641> 1586 (31.0) - a bit flat
3N37 9.1gr <1654> -
I was hoping for more velocity with these loads.
115gr Gold Dot, OAL = 1.142 +/- 0.003, new Starline cases, WSP
N320 4.6gr <1055> 1172 (11.2)
N320 4.8gr <1059> 1193 (10.0)
N320 5.0gr <1103> 1224 (12.1) notice about 120fps over published values, but
N320 5.2gr <1148> 1260 (14.4) consistent with previous loads at 4.7gr, diff bullets
N320 5.4gr <1192> 1286 ( 7.8) notes: no pressure signs, no flattening
* Compare to historical data: VV-N320, West-Coast plated round-nose
(PRN) 115gr, 1.120" and Hornady XTP 115gr to 1.100"
PRN XTP
4.7- 1167 (16) 1207 (16)
5.0- 1212 ( 6) 1248 (15)
5.3- 1257 (17) 1302 ( 3)
3N37 7.0gr <1316> 1264 (16.0)
3N37 7.2gr <1340> 1275 (15.0) notice about 60fps under published values
3N37 7.4gr <1364> 1294 (15.0)
3N37 7.6gr <1387> 1334 ( 6.2)
3N37 7.8gr <1411> 1344 (17.0) - a bit flat
I was hoping for more velocity with these loads.
124gr Gold Dot, OAL = 1.142 +/- 0.003, new Starline cases, WSP
3N37 6.7gr <1218> 1189 (25.0)
3N37 6.9gr <1244> 1230 (15.6)
3N37 7.1gr <1270> 1242 ( 8.6)
3N37 7.3gr <1296> 1271 (17.0) - a bit flat
This seems a little slow, especially from the long full-size barrel.
* Compare to historical 3N37/124GD data:
9x19 124GDHP, Various Brass, 1.142", 6.6gr VV-3N37, Glock19: 1177 (10.1)
9x19 124GDHP, Various Brass, 1.142", 6.6gr VV-3N37, CZ75BSA: 1192 (10.5)
9x19 124GDHP, New Win Brass, 1.142", 7.1gr VV-3N37, CZ75BSA: 1233 (62.7)
without "flyer": 1264 (10.2)
Same load shot 9-27-2002, in Glock19: 1242 ( 8.7)
Same load shot 9-23-2002, in Glock19: 1253 (20.1)
Same load shot 9-27-2002, in BHP : 1252 (10.5)
9x19 124GDHP, New Win Brass, 1.142", 7.3gr VV-3N37, Glock19: 1299 (15.3)
Speer Gold Dot 124gr +P Factory loads chrono to about 1310fps in this pistol.
147gr Gold Dot, OAL = 1.155 +/- 0.005, new Starline cases, WSP
3N37 5.0gr < 954> 922 (15.0)
3N37 5.2gr < 990> 951 ( 9.0)
3N37 5.4gr <1026> 967 ( 7.0)
3N37 5.6gr <1062> 979 (15.0) - up to here, no flattening
3N37 5.7gr <1080> 1012 ( 8.0) - here on, a little flattening
3N37 5.8gr <1098> 1033 (11.0)
3N37 5.9gr <1116> 1056 ( 6.7) notice about 60fps under published values
* Why is this so slow ?!