Regarding IMR 7625. It has never failed me. I have used it exclusively for 2.5" 12ga. loads for a long time. I have never found a reason to use anything else. There is plenty of load data for it on the site for 2.75" loads. There has been some discussion about higher pressure in 2.5" using 2.75" load data. If you believe this, then just drop your load down to 7000 psi. Most older 2.5" Brit guns are proved to about 8700 psi. The stuff works in temps down to about 50° very well. Below that I don't know. Jim

Originally Posted By: FlyChamps
Originally Posted By: pooch
This IMR 7625, I assume it is slow burning. Can it be used with a bushing or must one weigh each load?

I have both a scale and an adjustable bushing bar


It's a granular powder with a fairly fine grain. It meters as well or better than any other powder I use. My Sizemasters with MEC bushings throw very consistent charges.

It has a burn rate near that of Unique but the low pressure 16 gauge loads that Tom Armbrust tested for me with SR-7625 were much more uniform than those with Unique. I now use SR-7625 for all of my 12 and 16 gauge low pressure loads.

Last edited by Jim Moore; 01/31/13 05:32 PM.
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