Other data, since 9.5x57 and 9.3x57 are so similar. In the 9.5, the pressures and speeds might/should be slightly lower than developed by these. Note - rifle used was a model 96 Mauser, by Husqvarna, made in 1929.

Note, as sized, .466" was the base diameter.
OAL - Over All Length
Unless noted, all brass RP 8x57 Mauser, necked-up straight then sized to fit my chamber for 0 headspace(crush fit).

Note 220gr. Hornady FP is sized down .375 Hornady FP
Note - 225gr. Hornady is sized down .375 Hornady SP.
Note - 300gr. Hornady is sized down .375 Hornady SP.

232gr. Norma Vulcan - WLR Primer - 50.0gr. H4895 - 2.865" OAL - 2,442fps. base web expansion .466/.4662"

232gr. Norma Vulcan - WLR Primer - 52.0gr. H4895 - 2,990" OAL - 2,436fps - base web expansion .466" no expansion over FL sized.

232gr. Norma Vulcan - WLR Primer - 50.0gr H335 - 2.990" OAL - 2,362fps - ?

232gr. Norma Vulcan - WLR - (30/06 brass) - 54.0gr. BLC2 - 2.990" OAL - 2,336fps - ?

225gr. Hornady S.P. - WLR Primer - 52.0gr. H4895 - ?????? OAL - 2,558fps

220gr. Hornady F.P. - WLR Primer - 52.0gr. H4895 - ?????? OAL - 2,547fps

270gr. Speer----------WLR Primer - 48.0gr. H4895 - 3.045" OAL - 2,268fps base web expansion .4661" = 1/10,000" over sized dia.

270gr. Speer----------WLR Primer - 48.0gr. BLC2 -- 3,045" OAL - 1,978fps

270gr. Speer----------WLR Primer - 50.0gr. BLC2 -- 3,045" OAL - 2,111fps

270gr. Speer----------WLR Primer - 52.0gr. BLC2 -- 3,045" OAL - 2,300fps base web expansion .467" (.001" over sized diameter)

293gr. TUG -----------WLR Primer - 45.0gr. H4895 - 3.070" OAL - 2,180fps .4660" - no expansion

300gr. Hornady R.N.- WLR Primer - 45.0gr. H4895 -- 3.070" OAL - 2,170/5fps - base web expansion .4661", to .4662"