I would have to say power pistol with unique being a close second. I say power pistol because you can get top velocitys out of the 9mm and 45, and it will get a 357 moving pretty good.
Another vote for Unique or Universal. Im curious about universal.. I keep hearing it meters better, but unique meters perfectly out of my PM (literlly 100 out of 100 perfect throws).
In the calibers you mentioned and then some, Ramshot True Blue it will do anything the other powders mentioned will do with equal or better performance. It meters exceptionally well because it is a dense fine grained ball powder which may very well contribute to the low standard deviations you can expect to get.
Are HP38 and W231 the same?
Rather than arguing, go to the source.
If anyone would know, it's Hodgdon, they market Hodgdon and Winchester powders (along with IMR).
Look at their online data, charge weights, velocities and pressures are all identical.
Don't take our word for it, go look for yourself.
When I started reloading a few years back I decided that one possibile way of finding out if HP-38/Win 231 was the same was to e-mail directly to Hodgdon.
One of their techs was kind enough to reply that as has been stated.....and stated....and stated....and stated - LOL- YES! - they are the same powder and any published load for one will work for the other.
There are a few Win/HP combination pairs that are the same, I just can't locate my list. HP-38/Win 231 is the only powder I use for 4 calibers.
Unique is not my favored powder however it does seem to propel just about anything and do it reasonably well at even near the ends of its useful spectrum.
Bluedot, 1 size fits all, I load 9mm, 357, 45ACP, 5.56, 7.62X39, 30-30, 243, 308, 45LC, having said that, I prefer to use IMR4064 for the 5.56 and 7.63X39, but Bluedot in the rest, and Bluedot will work fine even in these.
Oh, and it haas been widely reported for years that HP-38 and 231 are the same powder. The differences in the loading manuals are part of the same variability of gun/production lot/human operator that causes different manuals to show wildly different max loads for the same powders. That's especially true of some of the older manuals where the testing was so highly dependent on 'eyeball' pressure readings and less on objective transducer data.
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