I'd appreciate some input about flash hole de burring tools and digital powder scales.

Is flash hole de burring / uniforming part of your standard process?
If I understand correctly this is done once during the life of the brass.
Is there a noticeable difference after flash hole work?
I assume this depends on how true the flash hole is on each individual piece of brass.

Which tool would you recommend?

I've had no luck with digital scales, all were either inaccurate compared to my balance beam type, frustrating to use or failed completely.

Which digital scales under $120 would you recommend?
Is my price point the problem.

I've had great luck with my RCBS Rangemaster. Had it for about 4 years now, and it is super accurate and well within your price point.

I have never used a flash hole tool in 25yrs of reloading.
Precision target shooters use it as part of a routine which also includes weighing every case & bullet for consistency.

For pleasure/hunting, if it went boom the first time, as you reload a case you punch out the primer thru the flash hole, It will/should boom again.

Make sense?

I have found with my electronic scale it works much better if I leave my cell phone in another room.

If you will look through you flashole from the back of the case on each case and there is nothing blocking the hole you should be fine for hunting accuracy. Yes it is only done once. On brandnew brass you will nearly always find some cases with somthing blocking the flash hole a little and it can cause slower ignition of the powder. Check out Benchrest dot com. and find Sinclair International and they have the tool if you want to ease your mind. The idea behind it in benchrest shooting is that uniform flash holes create even combustion of the powder. When I started trying these fine tuning tecniques working on accuracy I ended up with two full blown benchrest rifles and lots of dollars poorer lol.

I teach flash hole de-burring and primer pocket uniforming in my classes. However, I also explain that I have several sub-MOA rifles that have never noticed when I uniformed or didn't. I mainly shoot tactical competitions and I don't dabble in benchrest. The benchrest shooters do get results from the process. But if you don't have a benchrest rifle, it can be time consuming with little return for efforts.

Digital scales are subject to external variables that balance beams are not. However, a RCBS Chargmaster can give excellent results in much less time. The key to quality digital scales are:

1) Steady room temperature
2) Let it warm up at least one hour prior to use
3) Use a computer line conditioner to make the voltage it receives steady.
4) Keep it away from florescent lights and cell phones.
5) Use it in a draft free area since wind can give a false reading.

Honestly, for hunting loads where you are not shooting much past 100yards, I would just use a quality powder thrower. If you want to get all the accuracy you can, weigh each charge.

Thanks for all the advice, it is appreciated.

I bought a flash hole de burring tool and the RCBS Rangemaster.

91% of the brass I've flash hole de burred so far had what I'd call a substantial burr to remove. 17% the burr partially blocked the flash hole.

I shot 20 rounds of the exact same composition except 10 were and 10 weren't de burred. I saw an improvement in my rifle with the de burred.

The rangemaster works a lot better than the others I've had. It checks out inline with my balance beam every time. The power source is running through a conditioner.
I weigh each charge, every 10th is weighed twice and then checked on my balance beam.

I've heard about the cell phone but not about fluorescent lights being a problem.
Guess what my reloading bench lighting source is,,, a screw in type 26 watt fluorescent light.
Most folks set up I've seen have a shop light with 2 40 watt fluorescent bulbs hanging over their bench. Thanks for the heads up.
I would think the heat from an incandescent bulb would be worse.

What kind of light source should be used?

I would recommend some High CRI LED floodlights... And that's only because I sell them and they are very expensive.. LOL
Fluorescent lights have little or no proven effect on digital devices. Older magnetic fixtures (magnetic ballasts) were reported to have some effect if the devices were placed within close proximity to the fixtures.. However, anything you've bought in the past 4 or 5 years have been electronic ballasted fixtures... And those have no effect.
If you're interested in some of the aforementioned LED fixtures, let me know.. And no, you can't buy them at walmart or home depot.