Greetings All!
I figured I'd post some results for reloading .40 Super. I developed the load in a very unsafe way: I weighed a bunch of DoubleTap .40 Super 200 gr. Nosler JHP rounds, and subtracted the average weight of one of their cases and the weight of the bullet, and then gave myself a little wiggle room for experimentation (I justified this process to myself in that I have heard that DT uses Longshot powder). I was using a Lone Wolf 4.6" barrel in a Glock 21.
None of these showed pressure signs beyond what is normal from factory ammunition in my Glock: minor cratering and definite striker channel embossing. Primer flattening was minimal (much more like .40 S&W 155 gr. Hornady ammo than a 10mm 180 gr. Remington ammo). They showed only slightly more flattening than the .400 Corbon I also chronographed and posted earlier.
When working up loads, I will weigh bullets individually to give me a better idea of what the results are telling me. Those averages are on here. The target COAL was 1.250", which was the approximate average of the lengths of a sample of DoubleTap ammo.
I have also listed two sets of data for the DoubleTap load for comparison. The advertised velocity on the box was 1350 fps for a 6” barrel and 1300 fps for a 5” barrel. Extrapolating this data, I was expecting to get ~1280 fps from my 4.6” barrel (spoiler alert: it didn’t happen).
WARNING: These loads are for informational use. If you decide to use these loads, you do so at your own risk. You assume full responsibility if you get hurt using this data or trying to duplicate it in any way; it is your own fault... and your mistake will probably be immortalized by a YouTube video that gets 500,000 hits and has a string of comments questioning the level of your intelligence.
DoubleTap 200 gr. Nosler JHP
Low: 1181
High: 1228
Avg: 1210
E.S.: 46.85
σ: 12.92
Individual Velocities:
1211
1202
1210
1201
1181
1214
1220
1218
1214
1228
DoubleTap 200 gr. Nosler JHP
Low: 1186
High: 1226
Avg: 1208
E.S.: 39.32
σ: 14.69
Individual Velocities:
1186
1188
1198
1219
1219
1204
1226
1201
1224
1217
9.7 gr. Longshot
Low: 1187
High: 1218
Avg: 1201
E.S.: 30.83
σ: 9.48
Avg. Bullet Weight: 200.0 gr.
Average COAL: 1.2498”
Individual Velocities:
1210
1198
1197
1207
1194
1190
1218
1205
1187
1202
9.9 gr. Longshot
Low: 1212
High: 1254
Avg: 1225
E.S.: 41.72
σ: 11.66
Avg. Bullet Weight: 200.0 gr.
Avg. COAL: 1.2498”
Individual Velocities (1 shot was not recorded by the chronograph):
1223
1218
1224
1224
1221
1225
1254
1222
1212
10.1 gr. Longshot
Low: 1219
High: 1244
Avg: 1232
E.S.: 25.21
σ: 8.83
Avg. Bullet Weight: 199.9 gr.
Avg. COAL: 1.2495”
Individual Velocities:
1219
1226
1237
1244
1232
1221
1232
1241
1240
1224
10.3 gr. Longshot
Low: 1229
High: 1255
Avg: 1246
E.S.: 26.28
σ: 9.74
Avg. Bullet Weight: 200.0 gr.
Avg. COAL: 1.2502”
Individual Velocities:
1237
1254
1253
1251
1231
1246
1229
1255
1253
1246
10.5 gr. Longshot
High: 1246
Low: 1338
Avg: 1266
E.S.: 91.95
σ: 26.55
Avg. Bullet Weight: 200.0 gr.
Avg. COAL: 1.2505”
Individual Velocities:
1263
1263
1261
1265
1248
1246
1338
1271
1262
1247
I figured I'd post some results for reloading .40 Super. I developed the load in a very unsafe way: I weighed a bunch of DoubleTap .40 Super 200 gr. Nosler JHP rounds, and subtracted the average weight of one of their cases and the weight of the bullet, and then gave myself a little wiggle room for experimentation (I justified this process to myself in that I have heard that DT uses Longshot powder). I was using a Lone Wolf 4.6" barrel in a Glock 21.
None of these showed pressure signs beyond what is normal from factory ammunition in my Glock: minor cratering and definite striker channel embossing. Primer flattening was minimal (much more like .40 S&W 155 gr. Hornady ammo than a 10mm 180 gr. Remington ammo). They showed only slightly more flattening than the .400 Corbon I also chronographed and posted earlier.
When working up loads, I will weigh bullets individually to give me a better idea of what the results are telling me. Those averages are on here. The target COAL was 1.250", which was the approximate average of the lengths of a sample of DoubleTap ammo.
I have also listed two sets of data for the DoubleTap load for comparison. The advertised velocity on the box was 1350 fps for a 6” barrel and 1300 fps for a 5” barrel. Extrapolating this data, I was expecting to get ~1280 fps from my 4.6” barrel (spoiler alert: it didn’t happen).
WARNING: These loads are for informational use. If you decide to use these loads, you do so at your own risk. You assume full responsibility if you get hurt using this data or trying to duplicate it in any way; it is your own fault... and your mistake will probably be immortalized by a YouTube video that gets 500,000 hits and has a string of comments questioning the level of your intelligence.
DoubleTap 200 gr. Nosler JHP
Low: 1181
High: 1228
Avg: 1210
E.S.: 46.85
σ: 12.92
Individual Velocities:
1211
1202
1210
1201
1181
1214
1220
1218
1214
1228
DoubleTap 200 gr. Nosler JHP
Low: 1186
High: 1226
Avg: 1208
E.S.: 39.32
σ: 14.69
Individual Velocities:
1186
1188
1198
1219
1219
1204
1226
1201
1224
1217
9.7 gr. Longshot
Low: 1187
High: 1218
Avg: 1201
E.S.: 30.83
σ: 9.48
Avg. Bullet Weight: 200.0 gr.
Average COAL: 1.2498”
Individual Velocities:
1210
1198
1197
1207
1194
1190
1218
1205
1187
1202
9.9 gr. Longshot
Low: 1212
High: 1254
Avg: 1225
E.S.: 41.72
σ: 11.66
Avg. Bullet Weight: 200.0 gr.
Avg. COAL: 1.2498”
Individual Velocities (1 shot was not recorded by the chronograph):
1223
1218
1224
1224
1221
1225
1254
1222
1212
10.1 gr. Longshot
Low: 1219
High: 1244
Avg: 1232
E.S.: 25.21
σ: 8.83
Avg. Bullet Weight: 199.9 gr.
Avg. COAL: 1.2495”
Individual Velocities:
1219
1226
1237
1244
1232
1221
1232
1241
1240
1224
10.3 gr. Longshot
Low: 1229
High: 1255
Avg: 1246
E.S.: 26.28
σ: 9.74
Avg. Bullet Weight: 200.0 gr.
Avg. COAL: 1.2502”
Individual Velocities:
1237
1254
1253
1251
1231
1246
1229
1255
1253
1246
10.5 gr. Longshot
High: 1246
Low: 1338
Avg: 1266
E.S.: 91.95
σ: 26.55
Avg. Bullet Weight: 200.0 gr.
Avg. COAL: 1.2505”
Individual Velocities:
1263
1263
1261
1265
1248
1246
1338
1271
1262
1247
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