ORIGINAL: dmurphy317
Thanks for the ideas. I have several 6 gallon buckets that I could use. Another idea I had was one of those 12" tubes from the lumber store that are used for concrete footing forms, they are about 3 to 4 feet long.
Here are my shots into a 5 gallon bucket back in 2004 with different bullets to measure penetration:
http://www.the-gleasons.com/bullets_penetration_tests_for_mu.htm
you will see that the side get blown out and the bottom gets blown out on the 5 gallon bucket, that is "wound channel". The 5 gallon buckets are not deep enough, maybe he 6 gallon are deep enough, should be at least 25 inches deep. As for 12" footer forms, I think they will be too narrow and will blow apart after a shot or two. When you hit packed top soil with a ML you really put a lot of power into a small area and it really blows it up. Chap