H-4831 vs. imr 4831
#1
Spike
Thread Starter
Join Date: Jul 2004
Location: Md.eastern shore
Posts: 79
H-4831 vs. imr 4831
hello I want to load 270 winchester 140 nosler accubonds. nosler lists h4831 not Imr. I looked at burn rate IMR , a little faster rank 119 - 123. can IMR 4831 with this bullet? thank you
#3
Guest
Posts: n/a
Sure IMR can be used, but out of all the powders with the same numbering between Hodgson and IMR, 4831 is vastly different. IMR seems much faster than H4831sc. I would drop the load 4 full grains for IMR4831. Work up noting pressures.
Hodgdon's webpage has extensive data for 130gr and 140gr.
Last edited by bigcountry; 08-18-2010 at 06:44 AM.
#5
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#6
Typical Buck
Join Date: May 2009
Location: Colorado
Posts: 797
Bigcountry is right. Hodgen works differently in smaller cases being a slower burning powder. I use IMR 4831 in my 270 and H 4831 in my 300 win mag. You can load a lot more IMR 4831 in a case vs H 4831 because it's smaller pellet size and it burns faster and causes more pressure. But in the 270 win it's a good powder to use. You can fill the case close to where the bullet seats an have a great load. I would stay 59 grs or under of IMR 4831 until you've test a few rounds through your rifle. Then you can start tuning your load from there. One 270 win I have likes 58.6 grains of IMR 4831 and another 270 win is very accurate at 59.9 grains. Both are loaded with 130 gr bullets. You may want to start at a lower powder charge using 140 grain bullets. I have not loaded any 140's yet nor probably ever will unless I get a new rifle.