ImBillT
Well-known member
- Joined
- Oct 29, 2018
- Messages
- 3,896
The idea that someone pierced a primer at a sub-maximal load in a Barnes manual does not suggest that anything was wrong with Barnes’s data.
A) never start anywhere near max with any bullet.
B) you may be able to exceed max loads without showing signs of excess pressure at times, other times you may never get very close to them. Barrels vary, chambers vary, brass varies, and bullets vary. Ever notice how different manuals show drastically different max charges and velocities? They all use different barrels, different reamers, different brass, and different lots of powder.
C) Expect extra wide variations in data using powders that come from any of the Hodgdon brands. Hodgdon completely changed what powder is in the bottle without changing the label more than once. They also almost never update data. Ever notice loads listed in CUP right next to loads listed in PSI? That’s because the load listed in CUP hasn’t been tested since they changed over to PSI...the powder in the can labeled IMR 4198 has.
A) never start anywhere near max with any bullet.
B) you may be able to exceed max loads without showing signs of excess pressure at times, other times you may never get very close to them. Barrels vary, chambers vary, brass varies, and bullets vary. Ever notice how different manuals show drastically different max charges and velocities? They all use different barrels, different reamers, different brass, and different lots of powder.
C) Expect extra wide variations in data using powders that come from any of the Hodgdon brands. Hodgdon completely changed what powder is in the bottle without changing the label more than once. They also almost never update data. Ever notice loads listed in CUP right next to loads listed in PSI? That’s because the load listed in CUP hasn’t been tested since they changed over to PSI...the powder in the can labeled IMR 4198 has.