I've been using a 1970's RCBS beam scale good to 1/10th of a grain since uhh the 70's. (that's 1 tenth of 1 seven thousandth of a pound, depending on the powder, that's usaully one or two of the granules.)
The scale is not the problem in mass reloading, it's the powder thrower. I have a cheap ass $10 Lee thrower, but ya know, it drops 'em to 1/10th +/- without a hitch.
Does 1/10th make a rats ass on hunting loads? NO. The best Factory stuff isn't probably that close.
Does 1/10th make a rats ass on target/ competition loads; not unless you have done alot of extra work on the brass, primer pocket, bullet seating depth, freebore, crown, and a list I won't get any further into.
IMAO, spend yer money on shooting and experimenting (and just hunting with the boys). The scale may be a nice "I got one toy", but it ain't agonna help a hoot in putting a slug where ya want it on game.