I can't comment on this cartridge from a revolver however I can provide you with my observations with it from my Marlin 1894SS. Prior to purchasing this handy little powerhouse of a rifle, I did a lot of reading up on it and asking about it from owners over at Marlinowners. A lot of folks held the WWB 240gr JSP ammo in high regards so that is what I chose to use in my new rifle as I didn't have the reloading supplies at first.
The ammo made a good showing for itself at the range, providing me with some nice 1" groups at 50 yards with a couple groups making a ragged hole. During the 2005 I hunted with the 1894SS and WWB 24gr JSP ammo excluseively. During the begining of the season it was unusualy warm so there was no snow. I skirted around the base of a small knoll one afternoon to find a nice size doe feeding about 80 yards out. I shouldered my rifle and dropped the hammer on her, at the shot she bucked and kicked and was off like a shot. After a bout 10 minutes I walked down to were she was standing to pick up her trail and place my tag on my fresh supply of venison.
Much to my dismay when I got down to where she was there was no sign of here being hit, no hair no blood nothng
I thought this odd as a bullet that is pert near .50" in diameter should have left some sign. I proceeded to walk through the waist high dead golden rod that she ran through for a good 75 yards and still found no spore indicating a hit. At that point I figured I must have just grazed her.
One week later I dropped the hammer on a nice sized spike horn. He was trying to be sneaky by walking behind me only 40 yards away in broad daylight. At the shot he bolted towards a swamp into some of nastiest briar patches I've ever been through
Again I gave him some time and had a cup of coffee from my thermos. When I took up his trail I was dumb founded yet again. Again there was no spore indicating he had been hit. I followed his his tracks through the snow (thank goodness for the snow) for some 30-40 paces before I found anything.
The first thing I found was a tuft of hair but no blood, I continued following his tracks fo about 10 more paces in that nasty stuff. Finally I found some blood however it was only pin head sized dropplets and they were very faint even in the snow and sporadic. I finally found him about 100 yards from where I shot him. He was laying so that the side I shot him in was facing me with but a slight trickle of blood running down his side. When I rolled him over to inspect the exit wound I was dumbfounded when I found no blood under him or escaping from the exit wound.
Upon dressing him out I found that the 240gr JSP centered the heart and left a nice .430" hole through to the other side. Since that year I've sworn off the WWB 240gr ammo for use on deer. Shortly afterwards I got some reloading supplies for the .44 and have been using Hornady 240gr XTP-HP over some H110. This bullet has performed much better for me than the 240gr WWB ammo. When I got my 4PT this year with the above combo a blind person couldn't have missed the blood trail. Plus the deer only went about 20 steps and fell over. I like a bullet to expand do it's damage and continue on out the other side. The Hornady 240gr XTP-HP does exactly this so I'll continue to use it for deer.