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H-4831 "Long" has been for the most part unobtainable in my neck of the woods for months now. However, I did come across 4 lbs of H-4831 SC in a neighboring state and snapped them up. I seem to recall folks saying they thought the SC burned a bit faster than the "Long" and loads worked up from scratch should be started a little lower with SC than "Long". What is your experience?
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You might find any given lot of one a trifle faster or slower than a given lot of the other. As far as I can tell they burn the same. However, the SC has a little higher density. The old long variety just nicely fills a 243 case with 100 grain bullets. The short variety may be a better match in some 30-06 applications.
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For me, no discernable difference in everything from .243 to .348. But, 1) not trying to shoot the tiniest groups and 2) never load to where I would worry about pressure. Because of this, I've gone strictly to SC as it meters more easily. YMMV
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Did not notice much difference in a couple of calibers.
7x57 160gr Nosler Part. over 48grs H4350 = 2650fps. H4350SC = 2660fps. A new batch of H4350SC increased to 2700fps.
257 Roberts 75gr V-Max over 42grs H4895 = 3320fps. H4895SC = 3325fps
My notes read the loads were all shot in a outside temperature range of 55 to 60 degrees.
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Thanks Fellas, Hodgdons manual say's that they are ballistically the same also. The comments I recall surfaced not long after SC was introduced. The way I remember it was, the SC kernels had more surface area than the "long" and therefore burned a little faster and hotter. I remember reading it somewhere, I just can't recall where. It may have been just more grist for the rumor mill, or maybe, I'm confusing it with something else? But I wanted to ask here first.
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In spite of the above comments,
IME, in the 270 & 280 with known proven loads of the long cut version, I've had to cut back a couple of grains on top loads with the SC.
Just sayin................
MM
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I would guess that's due to what Denton mentioned, the difference between lots of powder. Obviously, a certain can of H4831SC isn't going to be the same lot as a can of H4831 "Long"!
A couple of grains difference in cases the size of the .270/.280 is normal variation between lots.
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No - my bad... I was comparing pre-Extreme to Extreme.
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I would guess that's due to what Denton mentioned, the difference between lots of powder. Obviously, a certain can of H4831SC isn't going to be the same lot as a can of H4831 "Long"!
A couple of grains difference in cases the size of the .270/.280 is normal variation between lots.
I've seen big changes with powder lots, particularly before IMR became part of the Hodgdon kingdom. I had one lot of I4350 act more like I4831. I always wondered if it was mislabelled.
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Yeah, I think I had a can of the slow IMR 4350, right after they went to the plastic Hodgdon cans. In a couple of .30-06s, 57 grains with a 165 was getting something like 2650 fps, which is a couple of hundred fps slower than usual with that load. I haven't bought a can of IMR 4350 since then.
Back to the question, I haven't seen a noticebale difference between recent H4831 SC and H4831.
Last edited by DesertMuleDeer; 02/07/10.
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In spite of the above comments,
IME, in the 270 & 280 with known proven loads of the long cut version, I've had to cut back a couple of grains on top loads with the SC.
Just sayin................
MM Me too......at least in a pair of 270's with top end loads. And I tried two different lots--but still, it could be a difference in the lot(s) of powder. Casey
Casey
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Thanks Again Fellas I expect a grain or two variance from lot to lot, I have only used H-4831 long in the past and like I said I just snapped up the SC because it was there and my other supplies are waning. I thought that maybe someone else might have recalled what was written at the time it came out and either confirm or put away what I thought I remembered reading about the SC version. I generally start 5-10% below top loads depending on the cartridge and work up so, I wanted to check here first with your experiences and go from there.
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I had the opposite problem last year - normally use SC in my 270WSM but could only find the "long cut". I didn't chrony it, just dropped down a couple of grains and worked back to the same load, and ended up there with the best accuracy.
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I've used alot of H-4831 and H-4831sc in a 270wsm with 120gr tsx. I've ran a bunch over the crony and shot groups in paper without beeing able to tell witch is witch.
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Umm the bouncing cursor is awesome.
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They have always worked the same for me. Pretty much any powder that has a short or supershort version has always given me the close to the same results as the long version. Still I have always been cautious when making a switch. YMMV
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