muskrat,
You're right....
W296 & H110 are basically the same powder, but they are processed differently. If you look at the two side by each, you'll easily see that the color is greyish-yellow for 296, and shiny jet black for the H110. This could be an identity issue, which is sometimes required by the parent company, when they sell to another for resale.
The shapes are different as well, and instead of being a visually "round" ball powder like H110, W296 has a somewhat flatter appearence.
Both are considered "ball powders".
The exact same difference holds true with HP38 and W231. They both appear as different powders visually, but when I tested them both side by side, I got the exact same results regarding velocity, accuracy, and ES & SD numbers.
HP38 is much cheaper, and next time I restock after my 231 is used up, I'll be getting a keg of it.
wis sharpshooter......
H110, W296 and Li'l Gun are probably the most used powders for jacketed bullets.
A2400 and H/IMR4227 are probably the most widely used cast bullet powders. And, using reduced loads with either bullet can range with a myriad of faster burning powders, but I'd bet Unique would get the nod for the most used.
I don't use jacketed bullets in my revolvers any longer, but when I did, I used the aforementioned load of 24.0grs. of W296 under the 240gr. jacketed bullets, and 26.0grs under a 210gr. Both Sierra's.
I have several different cast bullet styles I use now, and anything in the plainbased 240-265gr range, I'll use 8.5grs. of Unique at 1000fps., on up to lower charges of 2400 and a maximum of 1200fps., give or take.
My hunting load is 21.0grs of 2400 under a Lyman Devastator "gaschecked" hollowpoint at around 268grs total. The round pushes 1430fps., and is just like the bullet's name says....."devastating" on whitetails.
If you were to buy 3 powders only, I'd say Unique, 2400 and/or W296 or H110. That should cover it all.
Take care,
Bob