An accelerating charge emits radiation. It's one of the fundamental limiting factors in the strength of the LEP accelerator and is why the LHC uses protons. The amount of energy dumped is related to the charge and masses in such a way as to not depend on along, thus allowing for something to be said about the charge and mass of the object in question. The behaviour of the radiation, as modelled by quantum electrodynamics, is extremely well understood and verified across a huge range of energies. Something having 177000 times the electron's charge and mass would be utterly different to anything we see in an accelerator.
Then there's the manner in which detectors work. Modern detectors use wire chamber detectors, which pick up ionisations produced by a particle as it blasts through the detector. Charged particles are much easier to detect as their electromagnetic charge causes ionisations more readily than a neutral particle. Older detectors used to use bubble or cloud chambers, where the ionised particles in the fluid would act as nucleation points for the supersaturated medium, causing a trail of bubbles or cloud which could be measured visually. All other things being equal the more charged a particle is the more ionisation and the thicker the trail due to more parts of the detector being affected. Something with a charge of 177000e would leave trail unlike that observed in detectors, due to the extremely strong interactions it would have to particles not in its immediate vicinity (on a quantum scale).