Any experience out there? This one 270 grs at 2150 fps seems to outperform the 9,3x57 286grs round at 2000 fps... although the SD is better with the 286grs 9,3.
I am contemplating developing my taste from a fullribbed Mauser -98 9,3x57 to a slimmer than slim Mannlicher M1910 375 NE Rimless
Have any of you used a 300 grs in one of these little rifles?

Boha

The magazine rotor in a 1910 is shaped for the 270 gr RN bullet. Using any other bullet, you will usually only be able to load 2 cartridges in the magazine.

The case of the 9.5x57 has a shape much like a .30-06 and holds more powder than the 9.3x57, which is tapered very similar to the 7x57.

Thanks. Good points there.
That would suggest 300 grs bullet will have to be seated to same OAL as 270..

Boha

Not only is the OAL critical, but the ogive (shape) of the bullet must be the same as the round nose 270 gr.

Later M-S models used a bracket inside the magazine that supported the necks of the cartridges as they spun around the rotor, making bullet shape less critical.

Hi,
You can go to as light a bullet as the 235 grain Speer, BUT you have to be careful with the overall length, else it will not feed. The 270 and 285 grain bullets seem to feed the best in my rifles.
Larry