Foofer. This has been one of the more asked questions about model 85s. Have the 85CH. While the manual claims to say no, the catalog says yes. Since the catalog is updated more frequently than the manual some or constant use should be ok. The cosensus is that some +P use will not hurt the revolver. +P rounds can batter or stretch the frame over time. Depends on the amount of pressure for each particular +P round is loaded to. It all depends on how many rounds are sent down range that are +P and how often this is done. Standard pressure practice loads can be the same weight and have the same impact point as the +Ps for the 158 grain rounds. Lighter bullet weights might have different point of impact. Use the standard pressure loads for most of the practice at the range. Then shoot 20 to 30 rounds of +pP to stay current with that load. This causes less wear and tear on parts and the frame as well as cheaper in the long run. A steady practice with +P rounds can hit the wallet pretty hard. Even if most of the shots fired are of the +P variety, your revolver should be able to handle the steady diet. I have and older model 85CH. The cylinder is still tight with no end shake, timing problems,rattles,or other problems. Ruger's SP101 was designed for limitless +P use. S&W and Taurus models need a little more care. We have veteran members who have 85s with many +P rounds through their chambers and have had no problems. A search of the archives will bring this to light. Or even perusing the old threads on just this subject in the ammo dept. or here.