I have not yet used either of the 4895 powders. I keep seeing it come up in the threads and see it in many of my reloading manuals for calibers I load for (30-30,30-06,308,223,7.62x39,&444) IIRC I find more data for H4895 than the IMR version, and when data is listed for both the H4895 is typically listed before the IMR in the data. I have always thought the data is listed in order by best performance, I don't know if that is true or not though.
Is one powder typically better then the other (or may be I should say one have any advantage over the other)? Which do you use?