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That's interesting since when? would that be the same for all IMR powders? I would air on the side of caution as there is likely to be lots of old style IMR still for sale and none of the reloading...

H4198 is exactly the same as 2207 mate. IMR 4198 has a different burn rate.

Cheers John, that is pretty spot on with my validation, also had great accuracy at 59grs too!

Cheers mate that's interesting, according to the Hornady load data, I'm .5gr under max. Have validated drops and it worked out to be 2940ish fps. No adverse pressure either.

I was going to post up a similar thread, hope the OP doesn't mind me jumping on here.
GWH could you run this please?
.270 Winchester, 145gr ELD-X, 59.5gr AR2213sc, 22inch barrel suppressed, 3.330...