powder data clarification

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I'm looking at a bunch of powders to work up some new loads for a 30-06 that I just got. I'm going to be using the Barnes 175gr. LRX bullet. I wanted to used the powders that I have now which is IMR 4350 IMR 4831 and W 760. I was leaning to-wards the Win.760 because I have been reading that the IMR powders are somewhat temp. sensitive. Although I have never had any problems with it. I was just looking at the Hodgdon site http://data.hodgdon.com/cartridge_load.asp when I noticed their H4831 powder. Seems like it should be a pretty good choice. I'm thinking the low pressure of 44400 cup at the max load is a pretty good thing. What I was wondering about is the capital C behind the max load of 61.5C What does the capital C stand for ? There are a few other loads that have the capital C There is no explanation for it. C=Caution ???
 
Dont worry too much about "Temp sensitivity ", Most are talking about extreme heat vs -5c, never had an issue with any IMR powders at -25c. I do like Hodgon powder, try H4831SC- short cut. works great in the 06, as does 4350.
 
All 3 of those powders are fine choices for mid to heavy weight bullets in the .30/06. If you like a big boom, use the 4831, that used to be my go to powder for the '06, and was produced good accuracy with any bullet heavier than 168 grs that I seated over it.
 
I use H4831SC in 300WM with 180gn SSTs. I haven't found it to be temperature sensitive at all. You just want to make sure that you're not going over pressure if you're at near max loads in the heat of the summer if you worked up your load in the winter. But that goes for just about any load.

You mentioned that you have IMR4831 but then started talking about H4831. They are a little different. The IMR is a little faster. The H4831 and H4831SC are the same except the SC has been Short-Cut which makes it meter better than the regular long stick. I'd see if there's load data for your IMR 4831 and go with that if you're wanting to use use it up and not wanting to buy another powder. But when that runs out, I highly recommend the H4831SC.
 
WW 760 is about the most temperature sensitive a powder out there. As are most ball powders.
4350 and 4831 will do you just fine, be it H or IMR, just use the proper data.

Good shooting
 
Thanks for all the info. One reason I was thinking about the H4831 and now the SC was the really low pressures. I'm thinking it would be good for some off season practice for my son. Then next summer work up some hunting loads with one of the IMR powders or the W760. I never heard about the "Short Cut" powders before,. I have much to learn.
 
I tried H4831 in my '06 many years ago, and could never get close to the published velocity.... it is a slow powder for 30-06. I had better results with IMR4350 with 180 gr bullets.
 
this may be of help for you some testing I did in Sept
Rem 700 BDL
30.06
22"bl
Win Brass
CCI Benchrest primers.

P1090356-2.jpg

I ended up using Surpeformance with speeds of 2810fps
 
I too am curious how you worked up this load Manitou. Did you work up a best load in each powder then punched holes in that target with those best loads from different powders?
 
I've found H4831 a bit on the slow side for .30-'06, especially for bullets under 180 grains. I have some 260 grain bullets that I was thinking about loading in '06, so there I was going to start with the H4831.
 
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