Absolute lowest charge Titegroup .45acp ?

Well, some good news. Just got back from the range, testing a load. .45acp, 3.3 grains of Titegroup, 185 grain LSWCHP bullets by Precision Delta, 12 pound recoil spring in M1911A1. Functioned flawlessly and very accurate. 4 of the 5 first rounds were touching at 25 yards. Very manageable recoil. I might drop down to an 11 pound recoil spring, maybe. Will load 100 rounds and test again. If it works, I'll leave the 12 pound recoil spring in to lessen felt slide movement. It's controversial I know, but I'm a believer in using the heaviest recoil spring possible that still allows the pistol to function. Thanks to all that replied.
 
When I spoke with a Hodgdon rep about lower than listed loads of TiteGroup in my 9mm I was told that they find the maximum loads and then just use a percentage to get the starting loads. He told me that TiteGroup was a good powder to go lower on the loads with because it was not position sensitive. He also told me that while he couldn't authorize lower loads it was probably OK to do using caution.
I never got so low that the CZ75B did not function and you would have to go below that point before it gets dangerous.
I did the same thing with my Colt Combat commander in 45 ACP back in the '70s with HP38. I routinely check to see if I can find a minimum load that functions reliably. I don't remember going low enough to find that point in any of the auto loaders I have had.
 
I don't use Titegroup in 45 Auto, but I do occasionally in 45 Colt and other revolver rounds and I can confirm it is NOT position sensitive.

I have made 45 Colt loads with just a few grains and it's like there is just a dusting of powder in the big 45 case and they work 100% without issues.

As far as recoil sensitivity in the 45, I find HEAVIER bullets at slower speeds offer less offensive recoil vs the lightweight bullets. Load up a few 230g at 725 or so....
 
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