Glad to help.

For my M1910 (9.5X57 - .375 Nitro Express Rimless), the essential thing is to have enough 'meat' toward the top 1/3 of the projectile (toward bullet tip) and to keep the overall profile close to the original MS proprietary specs.

As I'm sure you know, the bullet shape and seated depth are critical for proper feeding in the Schoenauer magazine, particularly on pre M1924 models.