I suspect he transposed 25 to 52 while typing, but still, so what? 25 grains of 1680 would be way over pressure. 25 grains of 2700 would be way under pressure. They would all look similar. Unless you have some way of knowing you have commercial loads with not only 2230-C, specifically, but with your exact same lot number of 2230-C in them (because bulk powder burn rates vary a lot more from lot-to-lot than powders sold for handloading do), it doesn't help.
If the 52 grain number is not a typo, then check your scale. Something is way off, as no gunpowder made will let you fit 52 grains into a .223 case (unless maybe it's one of those compressible powders Hornady used to use in their light magnum loads and some of their Super Performance loads, and those aren't safe for a gas gun).
I would also, with a spherical propellant and an AR, be using magnum primers. See
this article for an explanation. Best would be to use a military sensitivity spec primer to minimize risk of slamfires. Be extra sure all primers are clearly below flush in the case, as high primers of any kind are a recipe for slamfires in a floating firing pin gas gun mechanism.
Military sensitivity spec magnum primers:
CCI
#41
TulAmmo
KVB556M
Wolf
NC223
Military sensitivity spec standard primer
Federal
GMM205MAR (not to be confused with GMM205M; the "AR" has to be on the end)