Coyotes, huh? Any of the 125 gr. JHP bullets, or 158gr semiwadcutters will be sufficient.
The reversed hollow base wadcutter can be effective at short ranges, probably much shorter than a 'yote is likely to approach you. BUT, and it is a big one...they tend to hit the target SIDEWAYS at distances much over 25 yards, sometimes at much shorter distances.
Remington 125 gr. Golden Saber loads are advertised at 975 fps, and the 357 mag. Golden Saber, which has a completely different bullet, is said to be loaded to 1220fps, a mid range load, but still effective. Match those figures, and you will probably have a good load.
For .38 Spl +P loads, .38 Special brass at about 5.0 gr Unique. A 125 gr. bullet will up the fps somewhat, and make life much more lively. Standard primers.
Is your pistol .38 or .357? If .357, use the magnum brass, standard primers. 5.5 gr. Unique/158 gr. SWC for a chronoed fps of 860 from a 4" barrel.