Author Topic: H powders and IMR powders - interchangeable? (Read 575 times)

lilabner · « **on:** February 14, 2005, 11:56:29 AM »

My local powder source carries H powders instead of the IMR powders I've used in the past. Instinct tells me I should start low and work up loads carefully as with primer or brass changes but I am curious. How do the powders compare in your experience? I will be using H4350 and H4831 for the most part.

clodbuster · « **Reply #1 on:** February 14, 2005, 12:15:46 PM »

DO NOT swap IMR 4831 for H 4831. H version is slower and most books will reccommend more of it than IMR 4831. I always cross reference several sources for load data for a given bullet weight and powder and then make doubly sure I am making fair comparasons. It ain't hard to make a mistake!

Redhawk1 · « **Reply #2 on:** February 14, 2005, 01:38:19 PM »

clodbuster said it right. I have been reloading for over 20 years and I have never done it and never will.

ricciardelli · « **Reply #3 on:** February 14, 2005, 03:47:29 PM »

Faster
*176 IMR-4350
*177 H-4350
178 S-365
179 TU-7000
180 N-550
*181 AA-4350

*185 IMR-4831
186 AR-2213
187 H-450
188 Magnum
189 Magpro
190 R-905
191 W-785
192 N-160
*193 H-4831
Slower

lilabner · « **Reply #4 on:** February 15, 2005, 06:40:44 AM »

Thanks for the advice and info. That is a very nice website, Steve!!