10mm Hollowpoints

Fellows I've been working with 10mm cast hollowpoints.  I started with the LEE 185 grain TC cast bullet.  I have a swage so I turned me die for my 10mm measuring .401 diameter. Next I made a nose punch that exactly fits the TC nose of the LEE bullet.  Next I made a pent point tapered pin to make a pent hollowpoint in the bullet. I shot these from two pistols: One a long slide Model 20 Glock and a long slide 1911. Both wear six inch barrels. Brass is Starline and the primers are Wolf large pistol. The powder is Herco and the charge is 7.5 grains. I believe this alloy was 20 to 1  lead/tin. Although I didn't chrono the velocity it's over 1000 fps. Okay I had a styrofoam cooler approc. 18 inches long and 8 inches wide. I cut cardboard panels to fit inside it. I had the tube passages in the cardboard pointing up.  I filled it with water and let it set overnight.  The first shot with my 10mm hollowpoint was with the Glock six inch barrel from five yards and a one quart  milk bottle filled with water in front of the cooler.  The second shot with the 1911 longslide 10mm was also from five yards fired first through a one gallon milk jug full of water.  None of the bullets exited the cooler,  Now when I shot one through the cooler with no water jug in front, it did pass all the ways through.  Here are the pictures .  Notice how the soda can aluminum freecheck stay on the bullets. The 19ll bullet mushroom is 5/8th to 3/4 inch diameter. Here are some pictures of all the goings on.