I use AA No. 5 mostly in my 45 ACP loads, and it performs extremely well with 230 grain lead bullets. I used to shoot the auto mostly, but as i have gotten older and crankier I have tired of chasing brass. Now I mostly shoot it out of my blackhawk and FA 83, which both have separate cylinders for the ACP.
I have tried it in the 45 colt, but have never been satisfied with the accuracy. This is probably not the fault of the powder, but rather that none of my revolvers seem to like the 255-260 grain bullets at moderate velocities (1000 fps or so). They shoot OK at 25 yards. But I have found that the group sizes open up disproportionately at greater distances. Past 50 yards they more resemble a "pattern" than a "group." I have had this problem with a variety of commercial cast bullets in the 255 gr weight range. Even the venerable Lyman 452424 Keith bullet has these problems.
Once I get to 300 grains the groups maintain consistency at 50 yards. With a 2x scope on either my Ruger Super Redhawk or my FA 83 I have no problem keeping 5 shot groups within a 3 inch circle at 50 yards all day long. Doesn't seem to matter which brand of bullet (or mold) I use. I have used NBC, Oregon trail commercial 300 grainers as well as bullets I have cast from Lyman and RCBS molds. all give satisfactory results. I am confident with these bullets that I can nail the vitals of a whitetail at 50 yards consistently on demand. The bullets I get from the LBT 320 LFNGC mold are even better. 4/5 in the 3 inch circle at 75 yards.
The question that I have for you all, is what do you consider to be acceptable accuracy with these light bullet?
Do you set your sights at 25 yards?
Do you check group sizes at 50 and 75 yards? Or do you just assume that a 1.5 inch group at 25 will become a 3 inch group at 50?
Over the years it has been a little frustrating for me, and it has left me wondering if mine are the only guns that the 255 grain bullets destabilize past 25 yards.
I read articles by "authoritative" gun writers in major magazines. They publish their tests and the results of their group sizes at 20 to 25 yards. But they never mention what happens to their group sizes past that distance. They then pronounce a given bullet/powder combination to be "superb" or "accurate" or whatever.
So let me know, guys. Is there something wrong with my guns? I can't be the only one who has ever noticed this. What have you found?
Sorry for the rant, which is probably tangential to the topic of this thread. But the poor accuracy of these light bullets at 50 yards and greater is why I don't use much AA No. 5 in 45 colt. Not the fault of the powder so much. I see the same problems with Unique, 231, and Universal as well.
Tom