I can't find reloader 15 listed as a powder for .3030 brit anywhere, but with that load you're in little danger. It's crude, but by comparing sectional density, volume of an empty case, etc, your load is probably somewhere around 28-29 grains, though an actual weight measurement would be safest and best. More accurate than a scoop!
That looks like it might be a decent cast bullet load, around 1700fps, and only 13kpsi. Well below the safe threshhold and borderline on paranoid. Are your brass coming out all black and sooty? primers pushing out the back a little? Such low pressure can cause a few issues...Plus, you're only burning about 60% of your powder. Until you get a scale to measure by weight, though, i wouldn't reccommend try ing to load em up any hotter. UNLESS you have a ful set of scoops. Again, with quickload calculating the load from volume, a 3.0 cc scoop would e about 40 grains probably get you in the neighbourhood of a decent hunting load, pushing your 150 grainer about 2300fps and generting around 32kpsi.
Estimating with the scoop (like trying to use 1 and a half scoops, etc) is dangerous. I mostly use a cheap $20 chinese electronic scale. Only 20gram capacity, but it measures to .01 of a grain so i'm happy
oh, and 2.985 is not really that short

not enough to make much difference unless you're loadign MAX loads.