Check your resistors... They say they are five ohms or what ever but they probably have a 10% tolerance so your not getting five ohms the 1.25/5=250mA is a perfect scenario if it was .5ohm under it would give you 277mA's..., and thats still in the resistor tolerance value... if it was a 20%...
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"It is hard to fail, but it is worse never to have...