Please forgive my possible ignorance, but I gather that JHP is a brand of ammunition, in which each round has 115 grains (?) of gunpowder? Is 115 grains considered much, or little, or in-between? Thanks.
JHP stands for Jacketed Hollow Point, also known as 'flying ash trays' ... The brand of ammunition I was referring to is actually made by CorBon ... the CorBon +P 115gr JHP specifically ... CorBon makes rounds for law enforcement and military that us civie slobs can also buy. The +P stands for 'increased pressure', meaning that the round is loaded (with propellent/powder) slightly hotter than a typical 9mm round, so it has a higher velocity than a 'normal' 9mm round. The '115gr' is the weight of the bullet itself, not the powder.
+p rounds should only be fired thru higher quality guns in good condition, btw. I have put around 3000 rounds of the +p through my Beretta 92F (and maybe 5000 more rounds that are not +p), and it is holding up well.
115 gr is the weight of the bullet in grains (437.5 grains = 1 ounce)
JHP = jacketed hollow point = bullet with a hollow cavity in front (which makes it open up and expand on impact) and a copper jacket surrounding it (so you don't get lead buildup on the inside of your barrel)