I have my pyrex at 450*F a lot and have never had one break apart from extreme heat. I did have one explode on time because I sat it on the counter top after Ipulled out of the oven. I sat it in a small amount of water that was on the counter top. Always make sure the counter is dry.
"Please let me be the person my dog thinks I am." ~Author Unknown
8 x 18 Haulmark Trailer
Fast Eddy FEC 100
Traeger Texas BBQ 075
UDS "Cool Hand Luke"
3 Weber Kettles and a Yellow Thermapen
KCBS Certified BBQ Judge #8425