I'd like to say right from the get go, I'm not looking for any recipes. Just looking for some pros and cons of each of the two powders. And the debate can really be replaced by "faster vs slower powders in x cartridge". I'm just an IMR fan and currently have a .338 LM I'll be loading up.
The way I see it.
Both have published loads for common 250 gr and 300 gr pills.
IMR 7828 (the slower burner):
-designed for high capacity cases
-has the higher published velocity, and fills case between 97% to 103%
IMR 4350 (the faster of the two):
-slower published velocity, and fills case between 86% to 91%
I know it's not all about velocity, however it still is a factor. I nicely filled case is also a good indicator as it will cause consistent burning. But, can there be too full? Getting into compressed loads leaves less room to push that upper ceiling for hotter loads while still staying safe.
Basically, is it safe to say that IMR 7828 is the better performer as long as you're staying in published data? However, IMR 4350 presents more opportunity for an experienced reloader?
Possible bonus pro to a slower powder: more powder still burning by the time bullet exits barrel, therefore bigger muzzle flash for photo opportunities. Speaking of photos, here's one for inspiration in this discussion. (It's all about looking good).
The way I see it.
Both have published loads for common 250 gr and 300 gr pills.
IMR 7828 (the slower burner):
-designed for high capacity cases
-has the higher published velocity, and fills case between 97% to 103%
IMR 4350 (the faster of the two):
-slower published velocity, and fills case between 86% to 91%
I know it's not all about velocity, however it still is a factor. I nicely filled case is also a good indicator as it will cause consistent burning. But, can there be too full? Getting into compressed loads leaves less room to push that upper ceiling for hotter loads while still staying safe.
Basically, is it safe to say that IMR 7828 is the better performer as long as you're staying in published data? However, IMR 4350 presents more opportunity for an experienced reloader?
Possible bonus pro to a slower powder: more powder still burning by the time bullet exits barrel, therefore bigger muzzle flash for photo opportunities. Speaking of photos, here's one for inspiration in this discussion. (It's all about looking good).
