7.62x39 bullet mould

[fieldwalker]

Hello all. I’m after some advice from anyone please to what mold id be looking for to cast for the indoor range. I’ve found a lee .312 155gr and was looking at 8grn of unique. But I’m not sure where to go from here. I want it to be within the range ‘noise’ tolerance. A lighter or heavier bullet? Any advice would be greatly appreciated.

Thank you

 

[Muir]

There is no way to tell. You'll need to make some bullets and give them a try. ~Muir

 

[Stalker62]

I want it to be within the range ‘noise’ tolerance.

Notwithstanding the advice from @Muir.

How does your range "noise" work?

Not sure I have heard of such a thing. Who sets it? Who checks it? Who enforces it?