Re: H4350 Vs. IMR4350
I have found the H powders in the extreme line has better temp sensativity and has a lower SD than IMR powders, that doesn't mean they will give you the best accuracy over the IMR powders, they can and can't! Depends on the load and bullet used and what your gun likes. I get vary low SD with varget in a load, much lower than any IMR powder I have tried and it also gives me great accuracy! Same can be said for other H powders as far as SD. If you shoot alot durring a specific time of year than shoot what shoots the best, if you shoot alot through out the year meaning from 20 degrees- 85 degrees I have found a closer point of impact with the H powders in the extreme lineup over IMR and really over ball type powders!
Another thing is I have a 25/06 it likes the IMR 4350 over the H 4350 as far as accuracy goes I use this mainly in the fall for big game so not a big deal with FPS changes and temps. Each lot of powder will be a little different but I believe in that extreme coating as the cronograph shows it to have some value! So if I ca get a laod to shoot well and decent fps with H powder I use it!