I usually print ABS at 250°C, but I've determined that the reported/set temperature is likely lower than reality. Even my PLA runs about ten degrees hotter than "internet average." Because you have a high temp limit, consider to slow the print speed by about 10-15 mm sec. It's a drastic change, but this is only a test. If you find that the clogging goes away, there's insufficient thermal mass to keep up with the material flow/speed.