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If you exceed that in handloads, or commercial ammunition, whatever happens afterwards is unpredictable. If you research it, the normal operating pressures of the small ring Mausers were the same as the M98 Mausers, which was 3,050 atmosphere, or 43, 371 pounds. Pressures had gone up a bit, but so had metallurgy improved. From Mauser Bolt Rifles by Ludwig Olsen, page 134, The maximum working pressure of the WW2 German 7.9 sS cartridge was 46, 926 psi. The 1939 German proof law called for proof at 130% of service load pressure. The article indicates it was applied to the 1898. The guns feature a traditional straight bolt handle, Chilean. The 4000 atmosphere proof was standardized for the 1893 and continued after 1911. The small cache of 7x57 mm Model 1895 Chilean Mausers brought in by Navy Arms are in two configurations, long rifles and short rifles. This provided that such rifles be proved with a government smokeless powder known as the “4,000 atmosphere powder”, proof pressure was 4,000 metric atmospheres or 58,000 psia. In this particular case a solution was sought in the decree of 23 July 1893. €œThe problem of smokeless proof was posed in a dramatic way by the Model 1888 and it commercial derivates. Gun Digest 1975 has an excellent article, “A History of Proof Marks, Gun Proof in German” by Lee Kennett. A comment on the metallurgy and process technology of the era, Dieter found records that indicated that the bolt lugs broke on 1:1000 of GEW98 service rifles used by the Bavarian Army Corp! M98 Mauser service rifles underwent a 2 round proof at 4,000 atm gas pressure, 1 atm = 14.6 psi, 4000 atm = 58, 784 psia. Rifle & Carbine 98: M98 Firearms of the German Army from 1898 to 1918 Dieter Kunhausen shows similar numbers in his book : “The Mauser Bolt Actions, A Shop Manual” While many Mausers in the 1908 Brazilian category will likely endure pressures considerably in excess of the 4,050 atmospheres proof loads, there might be some setback of the receiver locking shoulder with such high pressures Pressure of the normal 7 X 57 factory load with 11.2 gram bullet was given in Mauser’s 1908 patent boot as 3,050 atmosphere, or 43, 371 pounds. Proof pressure for the Mauser 98 in 7 X57 was 4,050 atmospheres (57, 591 psi). That procedure was in accordance with the 1891 German proof law.

Mauser 98 actions produced by Mauser and DWM were proofed with two loads that produced approximately 1000 atmosphere greater pressure than normal factory rounds.