Here is head scratcher to "decide" which highly respected load manual to use based on their pressure testing.
Nosler shows for .243 Winchester H380 at max load for 55BT at 47.5 grains at 3951fps. That's smoking!
Hodgdon shows same bullet with
H380 at 51.0 grains at 4010 fps! Laser!!!
But wait!!! How can this be?Hmmm
3.5 grain differential in maximum load based off
their pressure testing.
I guess you better be well versed in pressure observations with a 3.5 grain differential from
two HIGHLY RESPECTED RELOADING DATA MANUALS.
There is also a 0.040 differential on OAL but cannot be reason for 3.5 grain differential which is very SIGNIFICANT in potential pressure effects.
So who do you believe? Bullet manufacturer or powder manufacturer? They both have pressure testing capability. Where do I start for 55HH ladder?
What a conundrum! Sure glad I have 40 years of reloading to make appropriate VISUAL pressure observations. Just sayin...
View attachment 426652View attachment 426653