My experience on game mirror yours Dale53. I've had some bad experiences with RN bullets in pistol calibers, primarily .38's, because that is what I shoot the most of, and started with. I was shooting a S&W 15 at the time (still have it) and got a S&W 586, thinking I could get a liitle more velocity out of the .357. Had a bad experience with a jackrabbit shot just behind the front legs. Then bought a Marlin 1894 in .357 and the RN fed well in it, gave more velocity, and shot well. Had a real bad experience with a coyote I chased all over two sections and had to shoot a second time. The coyote was quatering to me the initial shot. I hit it in the left front shoulder and it exited the right side at the fourth rib. It was on three legs the whole time and stopped often. It was broken pasture,grass (Ft. Hood ,Tx). I caught it standing next to a junk pile for the second shot. Broadside, 30 yards, in the neck and actually hit the spine, deflected up slightly and exited. I skun that coyote just to autopsy it. Both entry holes were smaller than .38 and the initial exit hole was the same. The second bullet after hitting the spine fragmented and I found a small piece of it by the spine. The shoulderblade had a slighly larger than .38 and elongated hole in it as did the inside of the ribcage, I assumed because of the angle of entry. Trauma and small hole in the rear of the left lung and small amount of blood forward of the diaghram. That coyote had to of traveled nearly 3 miles within those two sections with me pushing it. I couldn't believe it took two shots after doing the autopsy.
That coyote really got me to thinking about bullet shapes and alloys. I believe firmly that the tools I use, either guns, traps or snares should be the most humane and effective when harvesting any wildlife. I've had much better results with flat or hollow point bullets, and believe transmitted shock from those two types of bullets are more lethal on either man or animal, so pursue that venue currently.