Centella
Member
- Joined
- Jan 21, 2023
- Messages
- 91
Hello friends,
I have been using N340 to handload 357 magnum for about a month now and I'm very happy with the results. The only issue I'm having is that data is very difficult to find. I've been looking at the data page from Vihtavuori's site and it works just fine, but the data there seems to be pretty "basic." At this point I feel ready to take my handloads to full power.
According to other handloaders, N340's velocities increase in a predictable linear pattern as you increase the amount of powder. Using this idea, I came up with my own loading chart taking Vihtavuori's data from their website as a starting point. Do you guys think this chart looks reasonable/safe?
357 magnum
Bullet: Berry's 158gr FP-TP
Powder(grains) Velocity(fps)
7.1 >>>> 1188
7.2 >>>> 1196
7.3 >>>> 1205
7.4 >>>> 1214
7.5 >>>> 1222
7.6 >>>> 1231
7.7 >>>> 1240
7.8 >>>> 1248
7.9 >>>> 1257
8.0 >>>> 1266
8.1 >>>> 1274
8.2 >>>> 1283
8.3 >>>> 1292
8.4 >>>> 1300
8.5 >>>> 1309
8.6 >>>> 1318
8.7 >>>> 1326
8.8 >>>> 1335
8.9 >>>> 1344
9.0 >>>> 1352
9.1 >>>> 1361
9.2 >>>> 1370
9.3 >>>> 1378
9.4 >>>> 1387
9.5 >>>> 1396
9.6 >>>> 1405
9.7 >>>> 1414
9.8 >>>> 1422
9.9 >>>> 1431
10.0 >>>> 1440
10.1 >>>> 1448
10.2 >>>> 1457
10.3 >>>> 1466
10.4 >>>> 1474
10.5 >>>> 1483
10.6 >>>> 1492
10.7 >>>> 1501
=========================
(MAX is velocity for this bullet is 1500fps according to Berry's)
I have been using N340 to handload 357 magnum for about a month now and I'm very happy with the results. The only issue I'm having is that data is very difficult to find. I've been looking at the data page from Vihtavuori's site and it works just fine, but the data there seems to be pretty "basic." At this point I feel ready to take my handloads to full power.
According to other handloaders, N340's velocities increase in a predictable linear pattern as you increase the amount of powder. Using this idea, I came up with my own loading chart taking Vihtavuori's data from their website as a starting point. Do you guys think this chart looks reasonable/safe?
357 magnum
Bullet: Berry's 158gr FP-TP
Powder(grains) Velocity(fps)
7.1 >>>> 1188
7.2 >>>> 1196
7.3 >>>> 1205
7.4 >>>> 1214
7.5 >>>> 1222
7.6 >>>> 1231
7.7 >>>> 1240
7.8 >>>> 1248
7.9 >>>> 1257
8.0 >>>> 1266
8.1 >>>> 1274
8.2 >>>> 1283
8.3 >>>> 1292
8.4 >>>> 1300
8.5 >>>> 1309
8.6 >>>> 1318
8.7 >>>> 1326
8.8 >>>> 1335
8.9 >>>> 1344
9.0 >>>> 1352
9.1 >>>> 1361
9.2 >>>> 1370
9.3 >>>> 1378
9.4 >>>> 1387
9.5 >>>> 1396
9.6 >>>> 1405
9.7 >>>> 1414
9.8 >>>> 1422
9.9 >>>> 1431
10.0 >>>> 1440
10.1 >>>> 1448
10.2 >>>> 1457
10.3 >>>> 1466
10.4 >>>> 1474
10.5 >>>> 1483
10.6 >>>> 1492
10.7 >>>> 1501
=========================
(MAX is velocity for this bullet is 1500fps according to Berry's)