Thread: 7x57 subsonic

I hope you are using cast bullets because they will work best at that speed. 8 to 10 grains of unique or similar pistol powders would work. Before trailboss that was the standard recipie for cast bullets and it still works just fine.
Your not talking about a long range number here 25 yards max I guess so subsonic it will have plenty grunt but placement is still the key.