Cobs are a good cold weather outdoor alternative. Cob bowls tend to be small and maintenance is easy. I think the problem with charred briar bowls outdoors is connected with breeze (sometimes the pipe seems to be smoking itself), a faster pace because you're smoking outdoors and its c o l d, and, finally, relights. Anything that makes you do relights can lead to rim charring, because the rim is unprotected from the flame, especially if the pipe is half full and it keeps going out, and most especially if you use one of those abominable torch lighters. But, if you can eliminate or reduce relights and use a cooler flame. your charring problem can be avoided completely, even outdoors in Winter. But if you insist on buying a new pipe, it's okay.