Bugger,
We've gone through this before: W760 is EXACTLY the same powder as H4141, and has been for a long time. It's made by the same factory, in the same way, but goes into differently labeled canisters.
The reason SOME loading manuals list slightly different loading data for 760 and 414 is different manufacturing lots burn slightly differently. But ever since Hodgdon acquired the Winchester powder line (which has been a while now) their data for both powders is exactly the same, down to the 10th of a grain and velocities.
That's what I believed, I don't see a big issue with H414 being discontinued.
I live in a portion of the country where the hunting season could be 70+ degrees F (or hotter) or it could be -20 degrees F (or colder). One year I might be hunting in short sleeve shirt and the next with full winter gear. I feel the 760 (and H414) are very temperature sensitive! If my rifle shot .1" groups with H414 that would be fine, but I
would not consider using it hunting. The smallest groups under ideal conditions isn't as important to me as POI and pressure not changing with temperature. Plus I've had serious issues with those old Winchester powders when I sighted in at 45 degrees and hunted at high temperatures. I think the worst was with WW785, but WW760 and WW748 will never be on my shopping list either.
There are a few powders in the normal burning range of H414 or WW760, I'd be trying H4350 or IMR 4451 or even IMR4350, if my rifle 'liked' H414.
