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Author Topic: H-110 140 grain bullets and 357 magnum  (Read 591 times)

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Offline PaulS

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H-110 140 grain bullets and 357 magnum
« on: January 17, 2006, 09:40:31 AM »
I have a question regarding H-110 in the 357.
I am starting a new batch of H-110 and was looking up past loads and found some that seemed a bit high so I looked in the Hodgdon manual and they list 17 grains as a maximum charge for the 140 gr JHP - Then I checked the Speer manual and it agreed. I am using Speer bullets. I then checked the Lyman manual (47th) and they list 19.5 as a maximum load with the Speer 140 JHP bullet - checked the Sierra manual and they list 19.5 too.
I have as my last load 17.4 grains and in my history of past loads I have shot 19.1 grains. I contacted Hodgdon and was told the discepancy is in technique and components from the different load developments. They stand by their data and do not recommend the higher loads. I checked the oldest Speer manual that I have (#11) and it lists 19.5 as maximum too. I am shooting a Ruger Security-Six and have never had indications of excessive pressure with any of my loads. I am wondering if the powder has changed or just the data. I guess I need to start below 17 grains and work up new loads.
Unless you have experience with a recent batch of H-110......
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PaulS

Hodgdon, Lyman, Speer, Sierra, Hornady = reliable resources
so and so's pages on the internet = not reliable resources
Alway check loads you find on the internet against manuals.
NEVER exceed maximum listed loads.

Offline doncisler

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H-110 140 grain bullets and 357 magnum
« Reply #1 on: January 17, 2006, 11:16:45 AM »
pauls.
H110 hasn't changed, i still use the same loads as i have for years and the ammo is the same.
can't tell you about the data from the new loading manuals, i havn't updated in a while.
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Offline Steve P

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H-110 140 grain bullets and 357 magnum
« Reply #2 on: January 17, 2006, 03:36:17 PM »
Rule of thumb, when you change lots of powder, work back up to your load.  17.0 grains of H110 in 357 with a 140 grain bullet is not a mild load.  

Check your load manuals and see what firearm the loads were tested in.  Most loading manual will indicate the firearm or fixture used.  Not many use a revolver.  So....you will have less pressure than say a bolt action fixture or a Contender.  

In my experience with 357 in a revolver, you usually start getting extraction problems with the brass prior to primers flattening and other signs of pressure.   Work up your loads with the new lot of powder and see where it takes you.  

I have very few guns that shoot max loads.  I usually don't have a problem with lot to lot changes in powder due to this reason.   I do have one 7TCU in a Contender that I double check by testing a new lot of powder.  With this gun, I usually load of 2-300 rounds at one sitting.

Good luck and stay safe.

Steve   :D
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Offline PaulS

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H-110 140 grain bullets and 357 magnum
« Reply #3 on: January 17, 2006, 05:53:11 PM »
Well my loads haven't changed in a few years either but it takes a while to go through 16 pounds of H110. I have just ordered a new supply and normally would just drop half a grain and work up to find the most accurate and consistant load with the new lot but I am currently thinking that I might want to use the older data to gain some performance. With that thought in place (look out) I am considering starting at 17 and working up to find a higher velocity accuracy load. I just hate walking into the dark with things that get dangerous fast. I checked the manuals and the older Speer manual used a Security-Six to get the 19.5 grain max load. The newer Speer manuals are using a weaker model 29 S&W.  The Hodgdon data uses a "test barrel" - probably a universal receiver type and the sierra manual doesn't say.
With the conflicting data I feel like playing it safe and staying with the 17 grain max but with the experiencial data from past loads worked up using the then current manuals and not having a problem with sticking cases or any other pressures signs I am considering working up to the other loads.
I guess I will have to think about this one until my powder arrives and I HAVE to decide one way or another.
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PaulS

Hodgdon, Lyman, Speer, Sierra, Hornady = reliable resources
so and so's pages on the internet = not reliable resources
Alway check loads you find on the internet against manuals.
NEVER exceed maximum listed loads.

Offline ricciardelli

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H-110 140 grain bullets and 357 magnum
« Reply #4 on: January 17, 2006, 08:37:57 PM »
H-110 From 15.2 grains to 19.6 grains
 CCI-550 Primer

I use 20.0 grains with a 125 JHP bullet.
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Offline DWARREN123

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H-110 140 grain bullets and 357 magnum
« Reply #5 on: January 18, 2006, 12:51:20 AM »
Remember that max is not always the best or most accurate load. Always play it safe, easy to load higher later on, hard to replace a hand or eye.
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Offline PaulS

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H-110 140 grain bullets and 357 magnum
« Reply #6 on: January 18, 2006, 10:19:22 PM »
DWARREN123,

I totally agree! I have found that with most H-110 loads about 97% of max is where I get the best accuracy - but I will be working this one up the long way.

ricciardelli,

Where is your info from? It's higher than anything I can find in any of my books.

PaulS
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PaulS

Hodgdon, Lyman, Speer, Sierra, Hornady = reliable resources
so and so's pages on the internet = not reliable resources
Alway check loads you find on the internet against manuals.
NEVER exceed maximum listed loads.

Offline ricciardelli

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H-110 140 grain bullets and 357 magnum
« Reply #7 on: January 19, 2006, 05:16:05 AM »
It is from my reloading and shooting benches.

And it was developed using S&W 659, S&W 5906, Ruger BN-36-X, Ruger P-85, Ruger P-89, and three Firestar Plus handguns.
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