You are absolutely correct. However, most loads given in manuals for the 7X57mm are kept within the SAAMI pressure standards of not much over 40,000 PSI in deference to the pre-M98 Mausers out there, and even worse, the old 7X57mm Remington rolling block rifles which some people insist on shooting.

In a modern, strong action, with slow powders, (I started my heavy 175-grain loading experimentsout using N205, then switched to MRP, and now I useRE 22) and a LONG THROAT, I am convinced that IT IS NOT POSSIBLE TO GET ENOUGH RE22 INTO THE 7x57MM CASE to cause excessive pressures when using175-grain bullets IN ANY OF MY 7X57MM'S! 54 grains of RE22 is all I can settle into the case and still be able to start and seat a 175-grain bullet without bulging the case shoulder. I have fired this load in a Ruger M77, a Ruger No. 1A, two Chilean M1935 ('98's) cavalry carbines, a Venezuelan FN M1924, and an M1956 Mannlicher Schoenauer. In these rifles, even the primer shows no signs of flattening whatsoever, and extraction is "normal".It gives 2729 FPS at 10' from the muzzle from22" Ruger barrels. From the 20" tube of the M/S, it only shows 2680 FPS @ 10'.

Naturally, any such load must be approached very cautiously from at least 10% below! As Bob Hagel cautioned in his book GAME LOADS AND PRACTICAL BALLISTICS FOR THE AMERICAN HUNTER, "All rifles are individuals, and what may be a maximum load in one might be quite mild in another, and vice-versa"!