As we all know temperature of gun powder in cartridge and air temperature plays a great role when determining the correct elevation for long range shot due change of velocity and due change air density.
In my experience(using Lapua b408 bullet, FED 215 and Lapua brass in 338LM)
N165= 0.9m/s to 1c of temperature change
N170= Equal to previous
N570= Equal to previous
H1000= 1m/s to 1c of temperature change
Norma MRP-2= 1.1 to 3m/s to 1c temperature change.I have not done enough testing on this powder to be positive on results.
The Norma MRP-2 is a discontinued powder and will be replaced
by Norma 217.
Sorry for metric units, but <span style="font-weight: bold">I would like to hear what is your experience on temperature sensitivity of gun powders. </span>Especially I would like to hear how do find H4831SC is keeping its promise in low temperature sensitivity.
In my experience(using Lapua b408 bullet, FED 215 and Lapua brass in 338LM)
N165= 0.9m/s to 1c of temperature change
N170= Equal to previous
N570= Equal to previous
H1000= 1m/s to 1c of temperature change
Norma MRP-2= 1.1 to 3m/s to 1c temperature change.I have not done enough testing on this powder to be positive on results.
The Norma MRP-2 is a discontinued powder and will be replaced
by Norma 217.
Sorry for metric units, but <span style="font-weight: bold">I would like to hear what is your experience on temperature sensitivity of gun powders. </span>Especially I would like to hear how do find H4831SC is keeping its promise in low temperature sensitivity.