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Powder Question (Read 4636 times)

psteinmayer KCA Forum Member Offline Krag Enthusiast! Posts: 2391 Location: Ypsilanti, Michgan Joined: Aug 30^th, 2011 Gender:	Powder Question Mar 9^th, 2019 at 5:22pm	Print Post
	This doesn't necessarily relate to Krags... but I have a question about powder. I purchased some H4831SC powder. I was looking for H4831, but they only had the SC (Short Cut) variety. I tried to check, and according to one site, it should be identical to regular 4831, just with a finer cut that should meter better. I want to be certain though because I'm using this for my Long Range ammo, which will already be near max load. So.... Do I use H4831SC the same grain for grain as standard H4831? I figured who else could I turn to for advice but the greatest bunch of experts around (meaning you jokers here at KCA)


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butlersrangers KCA Forum Member Offline Krag Enthusiast! Posts: 6330 Location: Michigan Bi-Peninsular&Proud Joined: Oct 7^th, 2009	Re: Powder Question Reply #1 - Mar 9^th, 2019 at 10:00pm	Print Post
	I'd call Hogdon and still start with moderate loads and work my way up, looking for any signs of excessive pressure.


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psteinmayer KCA Forum Member Offline Krag Enthusiast! Posts: 2391 Location: Ypsilanti, Michgan Joined: Aug 30^th, 2011 Gender:	Re: Powder Question Reply #2 - Mar 9^th, 2019 at 11:47pm	Print Post
	Amen to that!


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Parashooter KCA Forum Member Offline Kragmudgeon Posts: 514 Location: Connecticut Joined: Feb 4^th, 2010	Re: Powder Question Reply #3 - Mar 10^th, 2019 at 7:29am	Print Post
	According to QuickLOAD, burning rate is the same for both varieties of H4831 but the short-cut kernels allow a bit more weight of powder in the same space as "normal" H4831. This could be useful if you're planning on using it for your .30/06 long-range loads - as you might have difficulty stuffing enough regular H4831 in the case for sufficient velocity to be supersonic at 1000 yards - especially if you're sticking with that heavy LC brass you mentioned. Cartridge : .30-06 Spring. Bullet : .308, 178, Hornady A-MAX 30712 Cartridge O.A.L. L6: 3.340 inch or 84.84 mm Barrel Length : 24.0 inch or 609.6 mm Predicted Data for Indicated Charges of the Following Powders. Matching Maximum Pressure: 58000 psi, or 399 MPa or a maximum loading ratio or filling of 105 % USE ONLY FOR COMPARISON ! Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time % Grains Gramm fps % psi psi ms --------------------------------- ----------------------------------------------------------------- IMR 4350 105.0 56.7 3.67 2754 95.5 56119 11172 1.189 ! Near Maximum ! Hodgdon H4831 SC 105.0 59.8 3.88 2683 92.0 51473 11159 1.227 ! Near Maximum ! Hodgdon H4831 105.0 57.5 3.73 2567 89.7 44996 10581 1.305


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madsenshooter KCA Forum Member Offline Krag Enthusiast! Posts: 1079 Joined: Sep 10^th, 2009	Re: Powder Question Reply #4 - Mar 10^th, 2019 at 6:08pm	Print Post
	Pt em in different cases, so there's no chance of getting them mixed with your Garand loads.


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psteinmayer KCA Forum Member Offline Krag Enthusiast! Posts: 2391 Location: Ypsilanti, Michgan Joined: Aug 30^th, 2011 Gender:	Re: Powder Question Reply #5 - Mar 10^th, 2019 at 7:36pm	Print Post
	perhaps, I'll use HXP brass since I have a metric butt-ton of it! I plan on marking the cases to indicate that they're the LR ammo. I really appreciate all of the advice!!! Since I don't have a chrono, and I'm working from established load charts and the advice of my friends here, I truly do appreciate everyone's help!!!


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Parashooter KCA Forum Member Offline Kragmudgeon Posts: 514 Location: Connecticut Joined: Feb 4^th, 2010	Re: Powder Question Reply #6 - Mar 10^th, 2019 at 8:46pm	Print Post
	Just remember that most published data was developed in commercial brass, generally having greater internal volume than military brass (including HXP). Put the same charge in the military case and pressure will be greater, sometimes significantly. Weigh a sampling of several types and compare average weights to learn how much more metal is inside the heavier ones.


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madsenshooter KCA Forum Member Offline Krag Enthusiast! Posts: 1079 Joined: Sep 10^th, 2009	Re: Powder Question Reply #7 - Mar 10^th, 2019 at 9:44pm	Print Post
	Yea the components listed on published loads are part of the recipe. Fellow gave me a bunch of his once reloaded GI brass once. I noticed the imprint of the Garand ejector hole on about all of them. He'd started with a Hornady max load for his 168s and the load was developed in Frontier cases. I have no experience with Frontiers, and that was long ago, but I'll bet they were lighter than GI.


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psteinmayer KCA Forum Member Offline Krag Enthusiast! Posts: 2391 Location: Ypsilanti, Michgan Joined: Aug 30^th, 2011 Gender:	Re: Powder Question Reply #8 - Mar 10^th, 2019 at 10:39pm	Print Post
	The Hogdon data states Winchester cases. Perhaps I should bite the bullet and purchase some new Winchester brass. Also, I think they listed a Federal primer, and I had planned on using CCI #34 Mil-spec primers. If I'm not mistaken, the #34s burn somewhere between the 200 standard and 250 magnum primers... but have a thicker cup. There really is a ton of stuff I need to consider here!


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madsenshooter KCA Forum Member Offline Krag Enthusiast! Posts: 1079 Joined: Sep 10^th, 2009	Re: Powder Question Reply #9 - Mar 10^th, 2019 at 11:01pm	Print Post
	Sure is, l just noted the same 61gr 4831SC doesn't really get up to pressure in the 06 until you get up to 190gr. Noted pressure in CUP.


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psteinmayer KCA Forum Member Offline Krag Enthusiast! Posts: 2391 Location: Ypsilanti, Michgan Joined: Aug 30^th, 2011 Gender:	Re: Powder Question Reply #10 - Mar 19^th, 2019 at 11:10pm	Print Post
	Well, I set my OAL by sizing a spare case, inserting a bullet slightly and chambered it to set the bullet in the throat. Then, I took a Lake City 72 case, sized it, trimmed it, primed it, and charged it with 60.0 grains of the H4831SC. The case filled to the base of the neck. With the bullet seated to my OAL, the load isn't compressed, and I can hear the powder when I shake the case. Next... I'll load a bunch more, and then it's off to the range (as soon as it warms up, LOL)!


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madsenshooter KCA Forum Member Offline Krag Enthusiast! Posts: 1079 Joined: Sep 10^th, 2009	Re: Powder Question Reply #11 - Mar 21^st, 2019 at 1:11am	Print Post
	I remember 72s being lighter than 67s. I have that stuff jotted down from long ago, somewhere. Thinner neck, and I think flash holes were better centered. I still have some around here.


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psteinmayer KCA Forum Member Offline Krag Enthusiast! Posts: 2391 Location: Ypsilanti, Michgan Joined: Aug 30^th, 2011 Gender:	Re: Powder Question Reply #12 - Mar 21^st, 2019 at 2:33pm	Print Post
	The majority of my LC stash is 68. I may see how an HXP does too since I have a metric butt ton of those.


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