IMtheNRA,
The problem you'd run into is the RCBS lockout die has a nylon "tip" that slips into the case on top of the powder. You wouldn't have one for rifle cartridges and I'm not sure if the "rod" inside the die is long enough for rifle. I think you might be better off looking at a Dillon powder alarm in that case, though I'm not sure if they handle rifle cartridges or not, since I simply look at mine with a visual check and a good light.
I typically run about 400 30.06 or other rifle cartridges an hour going slowly on my Lock N Load while doing a visual powder check on each case.
Dave