One further note... Generally speaking heavier bullets can be substituted with no risk, HOWEVER, there are limits and 7.62x25 is a very small bottleneck design and I don't know your bullet shape for that 115 gr. bullet, but it's most likely designed for a M1 Carbine and/or .30-.30 with a longer nose than the typical pistol bullet... so if you keep within OAL you are pushing the base further back into the cartridge (how far, I have no idea... but it's not good to put the base back past the back of the neck in any case) and potentially affecting pressure unpredictably in a cartridge as small and high-pressure as 7.62x25.