Thread: 4x38 or 3-9x40 on 7.62x39 Bush Rifle?

Hi guys,

Setting up my Howa Mini 7.62x39. Mainly going to use for north island bush hunting on goats, deer, and pigs.

Have two scopes sitting around at the moment.
Weaver K4 4x38 Duplex Reticle
Zeiss Conquest MC 3-9x40 German #4 Reticle

The Weaver is significantly lighter, more compact and streamlined, but would 4x be enough? I've mainly been using 3-9x in the past, and sometimes a 4-16x. I suspect 4x is fine for hunting, but I've always used maximum power for sighting in with my variable power scopes, would 4x be sufficient for fine tuning the sighting in process at 100m
Low light performance is quite important too.

Any thoughts?