I loaded my Redhawk 44 rounds with 24gr of H110 and didn't get to shoot the gun for over a year.
When I fired the 44 I found that it had lost its power. Anyone else have this problem with H110?

H110 is the same as 296 but just a little to one side of the burning curve. I have loads that are 10 years old with 296 and they shoot the same velocity as the day I made them. I also have an old can of H110 that still shoots good.
I suspect your storage area. Too hot, too cold or very humid. Loads should be stored cool and dry.

I agree with bfr on this one. I've got loads older than my children (sad to say) that shoot just fine.

I use H110 a lot (and have used the similar WW296 a little as well) in 357 and 44 magnum and the 45 Colt and have not encountered this problem. What makes you think the cartridges have "lost power"? Did you chronograph the load then and now? Good hunting!

I have some hunting loads on the shelf that I bet will still go ( over the cronagraph) the same fps as when I loaded them 4 years back.

Have your loads been real hot /
Wet or damp location ?

Johnch

If your cases were contaminated with any lube, moisture or cleaner, your powder could have degraded. But under normal circumstances, ammo should have an indefinite shelf life if stored reasonably well. I have some 6.5x55 ammo that I loaded in the late 80s, and it still churns up the same velocities and accuracy it did back then.

Be very careful with H110, most loads they tell you start 10% below max and work your way up with H110 they say do not reduce any lower than 3% below max

Here is what happened to me with 240 JSP and my 44. I just bought the 44 so I wanted to get habituated to its recoil so I checked my reloading books and found a receipe for H110 in one of my old speer books. It listed a lower starting load than any other receipe.
What happened was I got some funky results some went off fine others smoked alot I had a jacket separation with the jacket in the barrel luckily it was in the forcing cone of the barrel and caused the gun to lock up. Well I should have stopped there but I cleared it and within a few more rounds stuck a bullet in the barrel, boy was that a job getting it out, it did end that days shooting

I wrote a letter to Winchester since I was using their primers, they responded it wasn't their fault since a primer either goes off or it doesn't,,, they do not half go off
I wrote to speer whose bullets I was using since I miked them and they miked alittle larger than what they posted them to be, they reponded it was within tolerances and it wasn't their fault
I then wrote to Hodgdon and they said improper charge. even tho I was using a published receipe and I was weighing each on an electronicscale. They explained each time they publish a new receipe it automatically negates any earlier ones. They also said that H110 was a sensitive powder that needed to fill the case for proper ignition
Since than I haven't used the powder agin.

H-110 is a wonderful powder when loaded to max levels and launching heavy for caliber bullets. It is absolutely positively not a powder to download ever. When run at max levels it burns consistently and provides excellent accuracy and uniformity.

The powder has a heavy deterent coating and needs a good spark to light it off, and good resistance to keep it burning. You'll be hard pressed to find a better powder for 300gr or heavier bullets in the 44 mag.

I have to agree with paul. For heavy loads H110 is great I use it with 310gr loads in my 44 and Max 158 loads in my 357 max. Never had trouble with it. Just don't down load it. There are lots better powders for down sized loads

I guess that was my problem. The loads I was using were not full case loads. Thanks!