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Old May 19, 2012, 07:33 PM   #1
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Does anyone know if H4831 and H4831sc have the same burn rates ? Does a
load for one powder apply to the other one also ?
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Old May 19, 2012, 09:00 PM   #2
Marco Califo
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SC means short cut. Think of noodles. Meters better in smaller calibers. Otherwise identical. Google hodgons load data center.
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Old May 19, 2012, 09:48 PM   #3
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"H4831® & H4831SC®

It is probably safe to say more big game has been taken with H4831 than any other powder. Bruce Hodgdon was the first supplier to introduce this popular burning rate in 1950. Since that time it has become a favorite for cartridges like the 270 Winchester, 25-06 Remington, 280 Remington and 300 Winchester Magnum. As an Extreme Extruded propellant it shares the fine quality of insensitivity to hot/cold temperatures, as well as superb uniformity from lot to lot. H4831SC - Ballistically, this Extreme Extruded powder is the exact copy of H4831. Physically, it has a shorter grain size, therefore, the designation SC or short cut. The shorter, more compact kernels allow the powder to flow through the powder measures more smoothly, helping to alleviate the constant cutting of granules. With the smoother flow characteristics comes more uniform charge weights, while the individual grains orient more compactly, creating better loading density. Available in 1 lb. & 8 lb. containers. Take the exteme tour"

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Old May 21, 2012, 12:08 PM   #4
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Thanks to both of you that answered my question. That's exactly what i wanted to know.
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Old May 23, 2012, 07:11 PM   #5
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There's a caveat!

They are designed to be the same burning rate. However, burn rates do vary between lots of powder, so a 'maximum' charge with that 'old' lot of powder one had last year may be a bit over maximum with the new lot one bought this week.

I once - long ago when I was younger and didn't get enough sleep - used a new can of H4831sc in my 'heavy' load in an 'improved' .30-06. Chronographed a 200 grain Sierra SPBT at just over 3150 f/s. Nothing went really wrong, except I could decap the brass (only five rounds) by blowing into the case mouth. As best I could figure, it was running about 80,000 psi.

Not Hodgdon's fault, my fault for not pay attention to the powder change.
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Old May 26, 2012, 03:36 AM   #6
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As the guys are saying its just a shorter grain, the advantage would be you could slightly increase your case capacity if you wanted to because it would fill the case better.
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