I've been loading my old Remington 700 30-06 with 47gr IMR3031 and 165gr Nosler Partitions since the mid 70's. I had an old Sierra reloading manual and got a minimum starting point and worked up from there.
In my closet I just found a 28th edition Lyman manual which suggests IMR3031 minimum at 44gr and maximum at 49gr.
I just went to IMRReloading.com and was redirected to http://www.hodgdonreloading.com/....... Does the IMR line now belong to Hodgdon?
Anyway, putting in my data above it recommends for a 165gr Hornady GMX - 41gr as the starting minimum and 44.1gr maximum.
and for a 165gr Sierra SPBT 45gr minimum and 48gr maximum. Nosler partitions are not listed.
Is this due to changes in the chemistry between the older and newer IMR3031, or the makeup of the jacket alloy of the bullets? or both.
I don't want to damage my trusty old model 700.
In my closet I just found a 28th edition Lyman manual which suggests IMR3031 minimum at 44gr and maximum at 49gr.
I just went to IMRReloading.com and was redirected to http://www.hodgdonreloading.com/....... Does the IMR line now belong to Hodgdon?
Anyway, putting in my data above it recommends for a 165gr Hornady GMX - 41gr as the starting minimum and 44.1gr maximum.
and for a 165gr Sierra SPBT 45gr minimum and 48gr maximum. Nosler partitions are not listed.
Is this due to changes in the chemistry between the older and newer IMR3031, or the makeup of the jacket alloy of the bullets? or both.
I don't want to damage my trusty old model 700.