Re: IMR 4350 vs H4350
Not sure if this has any relevance for you, but here is what I experienced in a custom 7-08.
I started with IMR and moved to H for the following reasons:
- I had a very accurate and stable load with IMR, however it was a bit slow even though I was near max charge. The H gave me nearly equal accuracy and velocity at the same exact load. However, it also allowed me to go quite a bit higher on my charge weight. As a result, I am now pushing the 162 amax at 2830fps using 48gr of H, where I was at 2665fps with IMR using 45gr. Couldn't reach those speeds with IMR before hitting pressure.
- H seems more temp stable compared to IMR.
- The smaller granules of the H flows better than IMR through my ChargeMaster.
- Because the granules are smaller on the H, I was able to fit more powder in the case without hitting a compressed load.