I've used reduced loads of H4895 in .30-06 and .30-30 Winchester. They are usefull for reduced recoil and muzzle blast, and when long-range performance is not needed.
For the 150 grain .30-06, I have long used 38 grains for a "midrange load for reduced recoil. The full load is about 50 grains.
I have not tried reduced loads for .243 Winchester, but friends have, and reported good results.
H4895/IMR4895 is one of those useful powders that is safe to use with reduced loads. It is medium burning rate, easy to ignite, and usefull all-around. Not so with BALL type or slow-burning propellants which have been connected with SEE incidents.
If you really want quiet short-range gopher loads, try loading buckshot with small charges of pistol powder (Bullseye, WW 231, etc). The give air rifle velocities and are almost silent!