Disagree. That Bisley is pretty stout stuff. The fireballs can be epic but it will take a great deal as H110 will run low on the pressure and well under Mr. Ruger's design. Of the powders listed by the OP I have tried them and would strongly lean towards H110. For upper velocity loads in the 45LC that is my powder of preferenceYeah, the problem with H110 in that application is that the minimum pressure to get it to burn completely, is right at about the max anyone ought to ever think about running in a Ruger .45 Colt. A pretty fine line.
250/255gr. bullets can give some spectacular fireballs with the stuff!
I found that 300gr. bullets are much better combo with H110/WW296. The extra bullet mass helps the stuff get lit. Bisley grip only, though. The standard aluminum frame Blackhawk grip isn't any fun with heavy loads.
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I disagree with the fireballs. Until your up into Linebaugh loading ranges they are not that bad of course that is relative. When in Linebaugh territory which i have visited with H110, 2400 and Unique you will get some epic stuff but the Blackhawk took it with little trouble.I'm not telling you it won't work. I'm telling you the muzzle blast and fireball will be spectacular, and unpleasant
300gr. bullets are MUCH quieter at max loads with that powder as you are burning less powder, and it burns more completely before exiting the barrel.
An extreme example is 500gr. loads in the .500JRH, vs. 300gr. in the same cartridge. The 500 gr. loads had a touch more recoil, but the 300gr. loads would literally blow everything off of the shooting bench. Not kidding!
Linebaugh runs H110 up to 27gr with the data specifically mentioning safe for 250gr XTP with pressure still in 30,6000 range and velocity at 1459fps. Unique he runs max at 12.0gr with about the same pressure and velocity at 1199 fps.Not one to suggest you are doing it wrong Sub, but if running an enchilada takes you 26.5 hrs, you may want to consider driving instead
Your memory is good, 250gr XTP is 26.5 Grs. from a Ruger, currently on the Hodgy site.
He gives a good rundown of this stuff with maximum 100% safe pressures for the Blackhawks at 32,000 CUP with a measured factory destruction pressure around 60,000 CUP so the loads he is running are safe and 1/2 the destruction level.
I've tried it for fun with a couple of my Blackhawks and I can tell you near the top it's eye opening to say the least. However, although I had no signs of pressure at all i wouldn't care to subject my pistols to those loads on a daily basis, hunting only type stuff imh as the recoil will get your attention. I slipped one near max into one of my long barrel Blackhawks and had my daughter shoot some. I taught her how to ride recoil so when that Linebaugh load went off the gun rolled in her wrist then went way over her head in a picture perfect arc. She looked at me then started laughing wanting more of those.
Be very careful doing this type of stuff if you try it. Linebaugh only recommends Blackhawks, Bisleys and Super Blackhawks. Some say Dan Wesson's are in this category but since Linebaugh specifically says Blackhawks that would be a good indication to stay with them. Always start at book an work up very slowly using a chronograph to show signs of erratic velocities along with visual inspection of the cases and primers. Anything look odd then STOP.
Here is a the site with a good read on the subject https://www.johnlinebaughcustomsixguns.com/writings
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