Ron,
I was looking on ebay a day or two ago and saw a mold that had a mistake in the description. There were no bids and that mold got re-listed. When it was re-listed the mistake in the description was removed. Want to know what the mold was? A REAL H&G #68 in their 4 cavity configuration. If I would have just bid on it when it was first listed I could have gotten it for $10 + shipping! It went the second time for $130 something. It adds a whole new meaning to "you snooze you lose!" I think I am still going to end up with it though, I notice that the person that won it had the same number of transactions as my wife! What a gal!
Enough of that.
I am exclusively using the H&G #68 type of LSWC in my 1911 for all of my shooting at this time. I have several 3lb coffee cans full, or partially full, of them. I have use a bunch of different powders in the 45ACP all with good success. Bullseye is my favorite and I have no problems with it on progressive equipment.
Another favorite powder for target type loads in the 45ACP is AA#2. I haven't gotten around to loading the #68 with it yet but will after the next batch of casting is done.
I know this is much more a matter of ascetics but I prefer the packaging of HP-38 over that of W231. I know they are the same powder but.... I have used it with this bullet, as Paul posted the link, with HP-38. Good success all around.
I can tell you this. When I started in PPC years ago, there was a fellow there that I got to glean a lot from. He was a real revolver pistolero. His main load for competition was 4.5gr of W231 under the H&G bullet. He shot a M625 with a 5" barrel and usually ended up spanking all of us!
I am still trying to determine which is the best powder for my type of shooting. I will try to keep all posted as I experiment.