How about a ball type powder reload recipe for 7.62x54r?

[Parashooter]

Plenty of data for Hodgdon's ball powders (BL-C2, H414, H380, H335) in 7.62x54R at their website. Cartridge Loads - Hodgdon Reloading Data Center - data.hodgdon.com

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[gandog56]

Plenty of data for Hodgdon's ball powders (BL-C2, H414, H380, H335) in 7.62x54R at their website. Cartridge Loads - Hodgdon Reloading Data Center - data.hodgdon.com

Yeah, but every stinking one of the BL-C(2) recipes uses a .308" bullet. I use .311-.312" bullets.

[Parashooter]

Yeah, but every stinking one of the BL-C(2) recipes uses a .308" bullet. I use .311-.312" bullets.

As long as your bullets are of conventional lead-core, copper-jacket construction, the small increase in diameter should make little difference in pressure, especially if .311-.312" bullets aren't oversize for your barrel. Normal cautious practices will allow you to develop safe loads by working up from the "starting load" data (or from the usual "10% below maximum" when no "starting" data is offered).

Another approach is to use data for the 7.5x55 Swiss, which has ~.006" deep rifling (~.296" x .308") much like typical Russian (~.300" x .312"), very similar effective case volume, and CIP Pmax. (MAP) slightly lower (3800 bar vs. 3900 bar). Consequently, starting loads for the Swiss with .308" projectiles can serve as starters for the Russian round with ~.312" bullets of the same weight. (Hodgdon's 7.5x55 data, not pressure-tested, seems very conservative in comparison to their pressure-tested 7.62x54R data.)