Let us assume that we are sizing our bullets to throat diameter or up to 0.001" larger. In the case of your 0.4525" throats, that means the bullets are 0.4525" - 0.4535" . It may be that your gun would shoot undersize bullets equally well, providing the bullet obturated quickly, however, a properly sized bullet is a safer bet.
Let us further assume that your sizing equipment will size your bullets to exactly 0.4525". In reality, it is normal for sizing dies to be off by 0.001" - 0.002", and it is normal for sized bullet diameter to vary depending on as-cast diameter, hardness, lube, technique, etc., etc.. We will nevertheless pretend that our sized bullets are a perfect 0.4525".
OLD WIVES TAIL: A correctly sized bullet will enter the chamber throat with light finger pressure.
REALITY: For reliable chambering, clearance is required. At least 0.0005" and probably more like 0.002". If your bullet can be pushed through the throat with light finger pressure, then the bullet is too small.
AND FURTHERMORE: I don't want to PUSH my revolver cartridges in the chamber. Cartridges should DROP in effortlessly.
In mass produced wheelguns, there is usually a grossly oversized tapered section in the chamber just forward of the case mouth. I'm not sure what this section is properly called. It allows an oversize front band to be chambered, as long as the length of the front band does not exceed the length of the oversized tapered section. Thus our mass produced gun is usually content to chamber a 0.453" or larger front band.
In a well made wheelgun, like an FA, there may not be a grossly oversized tapered section in the chamber, just forward of the case mouth. The chamber's tapered section may be shorter, or it may be smaller in diameter. A conventional bullet with a long front band of exactly 0.4525" diameter may not drop into the chamber. Hence FA bullet designs may utilize either a very short front band, or else a slightly undersize front band.
To shed more light on your situation, you would need an impression of the chamber.