Finally figured out my venting problem after a bad pour at the Spokane shop
I'd been getting these weird cold shuts on a particular gear pattern for months, always blaming the metal temp. My foreman, Carl, watched me do a pour last Tuesday and just said, 'Your riser is fine, but you're choking the vent sand.' I was packing it way too tight, basically sealing the mold. Loosened it up to about thumb pressure and the next three pours came out clean. Anyone else have a simple fix they missed for way too long?