In studying XXL provided load data for 375 H&H, 30'06, 7x57 I was astounded to find several powders that regularly gave pressure readings 8-10 thousand LESS psi than all others listed. Rel 23 (stellar), Vit N555, Accurate 3100, Lovex S071, H Hybrid 100v were regularly listed at 35K psi- 39K psi across many loads in all three (widely divergent) calibers above! And in checking other calibers on my wish list, the trend seemed to hold, within bullet weight parameters of course. In other words, these seem to plainly be low pressure powders. In some applications, old standbys like 4831 and MRP kept pressures lower, too, and moving up in bullet weight sometimes bumped selection from Rel 23 to Rel 25, etc. But many of the "temp sensitive" powders gave so much pressure comparably that it almost made the point moot.
Why worry about temperature sensitivity if you can keep pressures this low In the first place?
I'm thinking about not only applications for African heat, but for use in break action rifles and older Mannlicher Schoenauer rifles among others which can do without the stress and strain of hotter loads.
The only problem I am finding is locating enough commonly available published data--the kind you don't pay $30 a month to obtain, in applying these powders to above applications. If any of you have favorite LOW PRESSURE loads, please feel free to share. (with the usual safety disclaimers)
Why worry about temperature sensitivity if you can keep pressures this low In the first place?
I'm thinking about not only applications for African heat, but for use in break action rifles and older Mannlicher Schoenauer rifles among others which can do without the stress and strain of hotter loads.
The only problem I am finding is locating enough commonly available published data--the kind you don't pay $30 a month to obtain, in applying these powders to above applications. If any of you have favorite LOW PRESSURE loads, please feel free to share. (with the usual safety disclaimers)