Bingo, if you are a novice reloader (or even a veteran one for that matter), the Lyman Reloading Handbook is an excellent work to have in your library. This book will provide you lots of info on reloading both jacketed as well as cast bullets. It has data for both, in almost all calibers including 38-55. Lyman manufactures molds, but not jacketed bullets or powder, so when it comes to jacketed bullets, that company offers neutral information. My own book is the 48th edition (#49 is the current one) and mine shows 38-55 data and comments on page 270. If your rifle is in good condition you should easily be able to get between 16-1800 fps with a cast bullet weighing a nominal 249 grains. That's some pretty good thump, but then again, 1300 fps is pretty solid, too. There have been thousands (millions?) of black bear taken with 38-55 Winchester rounds since the introduction of that caliber in 1884, with black powder as well as smokeless cartridges, and jacketed bullets as well as cast. Maybe you need to get your rifle checked out by a gunsmith to confirm that it's safe before trying to work up a load for it. Then, worry about accuracy first. If you (or your boy) places a shot well, you won't find it necessary to "track the thing for three miles". If you make a bad shot, you'll track wounded game all over the place regardless of velocity and bullet weight. Again, good luck. I suspect you've got a fine rifle there for what you want to do.