The .30-06 should work on a cow, even with those equally obsolete Partitions.
I've killed two nilgai bulls with a .270, believe it or not, but it was a .270 Winchester Short Magnum, which no doubt makes a vast difference in field performance--and being named "magnum" may even change a cartridge's sexual orientation.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
