These pics show my test of the Winchester 22 mag ammo with the 2200 fps tin bullet. My improvised ballistic media is composed of the fine clay mud that we have in the foothills. In the first pic you can see the bullet coming in from the right, shown as a very light silverish streak, about to impact the sandwich bag full of mud. If the bullet works that well on squirrels it will be a winner. Accuracy was mediocre in the 10" TC. The shot in the video was from about 25 yds. Don't know if this is typical in this type of test or if the bullet actually blew up.
81 downloads Frame 55
61 downloadsFrame 63
54 downloadsFrame 73
54 downloadsFrame 93
These four pics were extracted from a video shot at 420 FPS. The time period covered is about 90 milliseconds. In that time frame the 28 gr bullet struck the 1.5 lb bag of mud and caused it all to start moving rather rapidly about the landscape.Link to Winchester announcement of Tin Rimfire Bullets
Maybe one of you math whizes could approximate how much of the energy that the bullet carried was transferred to the target. I estimate that the impact velocity was 1950 fps. If anyone would like the video, PM me and state whether you would like the dial-up or broadband version and include your email address.