I think we're dealing with convoluted terms. There is no way any current battery system would survive being charged at 50 times it rated capacity. A high discharge-rate battery simply means it is capable of releasing its energy at a fast rate, for a short period of time, and not getting damaged or overheating in the process. There is absolutely no risk in using a high "C" rated battery in the flight pack. You will never draw current anywhere near those capabilities. Higher "C" rated batteries are more expensive to produce, and that is why less exotic 5 or 10 "C" rated packs are typically recommended for radio system operation.
To the original poster: Research is always a good idea, but asking open-ended questions on these forums tend to bring out a lot of arm-chair quarterbacks that really need to separate opinion from knowledge.