kumpe:
Might we inquire as to the barrel length of your 1910 ?
You stated it is full-wood stock, does this mean a carbine?
Short barrels might sacrifice 150fps or more compared with the velocities quoted by others above.
My 1903 carbine with 17.7 inch barrel shoots the 160gr 6.5mm bullet at ~1980 fps with factory-equivalent loads, well below the velocity quoted for the rifle.

Also, finding a gunsmith with a 9.5x57 finishing reamer, and giving the chamber a quick tidy-up is a potential fix. It is possible that only a small high-spot could cause stiff extraction.
If it was mine, I wouldn't hesitate to polish-out the chamber with a "flapper" on an electric drill or dremel. Baby-steps though, can't put that metal back!

The cartridge-case separation mentioned above is likely to be from excess headspace, I have found this not to be uncommon in the MS. Protruding primers after firing (on the cases that don't separate) is a give-away. The easy fix for a hand-loader is to neck-expand up to ~10mm with a tapered expander, then push a new shoulder down with the 9.5 sizing die but stopping short of the old shoulder position. Trial and error with the first couple of cases to give a very slight resistance when closing the bolt will determine the new shoulder position. Then load them up and fire-form with full loads. Neck-anneal, then neck-size-only for subsequent reloads, but be prepared to push the shoulders down slightly again when chambering resistance begins to occur.

Bit long-winded, apologies. Hope this info is of some use.

Love the 1910 9.5 Mannlicher, been having quite a bit of fun in the field with mine...