NOTE** Please understand that this is for ammunition reaching Major Power Factor FOR COMPETITION SHOOTING. There are guns that cannot handle these HIGHER PRESSURES and CAN BE DANGEROUS if you do not proceed with caution. Make sure your firearm is built for this before continuing. Also these higher pressures can greatly effect brass integrity.
3 different powders in this post. You will notice some small notes with these. I figured I would go ahead and put them in here. These are strait from my Excel sheets.
Vitahvuri 3n37
Vitahvuri 3n38
AA7
I hope this helps!
Vitahvuri 3n37
COMPRESSED LOADS
7.0 Gr 1.16 oal .378 crimp Tanfoglio GT v4 Open gun Target velocity for 165 minimum power factor is 1330 fps
1318 Impressive consistency. Does not meet target
1313
1314
1317
7.2 gr 1.16 oal .378 crimp Tanfoglio GT v4 Open gun Target velocity for 165 minimum power factor is 1330 fps
1294 1309
1340 1314
1350 1332
1341 1304
1322 1312
7.4 gr 1.16 oal .378 crimp Tanfoglio GT v4 Open gun Target velocity for 165 minimum power factor is 1330 fps
1331 1338
1345 1339
1351 1339
1355 1328
1320 1316
7.6gr 1.16 oal .378 crimp Tanfoglio GT v4 Open gun Target velocity for 165 minimum power factor is 1330 fps
1374 1375 1372 average 1366.916667
1359 1380 1362 Standard Dev 11.48483849
1351 1386 1369 Power Factor 169.4976667
1354 1370 1351
Works the comp well. Very comfortable to shoot. Consider this as regular load.
7.8 gr 1.16 oal .378 crimp Tanfoglio GT v4 Open gun Target velocity for 165 minimum power factor is 1330 fps
1378 1363 1376
1382 stove pipe 1369 1341 average 1374.733333
1383 1369 1352 stove pipe Standard Dev 15.75919988
1370 1394 1396 Power Factor 170.4669333
1382 1368 1398
this does not like 8lb spring. diminishing return on consistency
Consider trying 8.0 – 8.2 gr. May need a stronger Spring
Vitahvuri 3n38
8.3 gr 1.16 oal .378 crimp Tanfoglio GT v4 Open gun Target velocity for 165 minimum power factor is 1330 fps
1342 1365
1336 1397
1353 1338
1329 1375
1355
I do not like the inconsistency of this round. Too high of extreme spread
8.6 gr 1.16 oal .378 crimp Tanfoglio GT v4 Open gun Target velocity for 165 minimum power factor is 1330 fps
1351 1392 1327
1352 1363 1382
1390 1371 1398
1376 1370 1384
1392 1324
Super Flat Shooting and comfortable! Lots of Gass running the comp
8.8 gr 1.16 oal .378 crimp Tanfoglio GT v4 Open gun Target velocity for 165 minimum power factor is 1330 fps
1370 1390 1389
1404 1368 1398 average 1387.466667
1388 1391 1380 Standard Dev 13.40504525
1372 1389 1401 Power Factor 172.0458667
1402 1366 1404
Little Recoil. Plenty of gas to run the comp. This would be a good round for competition.
Accurate #7
8.7 gr 1.16 oal .378 crimp Tanfoglio GT v4 Open gun Target velocity for 165 minimum power factor is 1330 fps
1330
1348
1331
1335
not as much gas as Vitahvuri powder
8.9 gr 1.16 oal .378 crimp Tanfoglio GT v4 Open gun Target velocity for 165 minimum power factor is 1330 fps
1386 1374 good gas 1411
1389 1398 1414 average 1386.666667
1381 1370 1395 Standard Dev 13.55236757
1375 1374 1374 Power Factor 171.9466667
1394 1380 1385
Decent gas. Better control than the 9.1. I prefer the Vitahvuri over the Accurate 7
9.1 gr 1.16 oal .378 crimp Tanfoglio GT v4 Open gun Target velocity for 165 minimum power factor is 1330 fps
1414 1399
1422 1396
1418 1421
1412 1411
1381
Noticeably more gas. Good Recoil.
9.3 gr 1.16 oal .378 crimp Tanfoglio GT v4 Open gun Target velocity for 165 minimum power factor is 1330 fps
1440 “ohh I don’t like that one”
1431
More recoil felt. Feels like diminishing return at this point. No more further testing needed.
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