A point of caution: By some published data, some of the above charges are below minimum. H110 is canister-grade WC (Western Cannon) 296, made by the St. Marks, Florida plant now owned by General Dynamics. When Winchester started selling this powder a year or two after Hodgdon did under the H110 name, the charge was fixed. For a 240-grain bullet in 44 Magnum, the Winchester load was 24 grains, period. The Handloader was advised not to attempt either to raise or lower the charge. It was a one-recipe-per-bullet-weight powder with no lower starting loads. The reason for this is something Hodgdon used to warn about on their web site, and that is that occasionally lower loads could fail to sustain combustion, extinguishing and leaving a bullet stuck in the barrel for the the next round to be fired into, a rather dangerous and potentially very damaging event. Hodgdon went a little more flexible on this, providing a short range of loads and recommending never to load more than 3% below their published minimum of 23 grains, which would work out to a lower limit of about 22.3 grains.
Hornady publishes a wider range, with their starting load a full 16% below maximum. They seem pretty clearly to be ignoring the warning about squibs altogether. The squib events would be rare to begin with, and most likely in revolvers, with their barrel/cylinder gaps to help drop pressure after the bullet passes it!. So it is perfectly possible to imagine Hornady going through a test series without ever seeing a problem, even if loading that powder that low still isn't a good idea.
It is perfectly possible there won't be an issue, especially not in a gun with no barrel/cylinder gap. But do remain alert for any round that sounds funny or doesn't recoil the way others do, or that has smoke curling it of the chamber. In such instances it is best to drop a cleaning rod in to check for sure there is no bullet stuck somewhere in the bore.
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