32 H&R Magnum. 12 gauge. I wouldn't push it with Unique. Select A Caliber or Gauge Below To View Recipes. WARNING. Maybe you guys can help.....I got a bunch of Unique and got 1000 S&S Cast 158 grain LSWC around BNH 16 sized at .358 according to them. I use it in my 44 Mag with 240gr SWC for my target load. Unique is a good powder for light or midrange loads in magnum revolvers.
JHP to about 1200 FPS, but when you start pushing Unique hard in .357 Magnum, accuracy will deteriorate quickly.

)(2009 Note: Some of these loads are from 1996 and in the passing years the powder companies have reduced their maximum loads particularly ones that have been around a long time like Unique.

The information displayed on this site, including ballistic data, was derived from tightly controlled laboratory conditions. I loaded up about 200 rounds with the recommended 6 grains of Unique for a nice mid range 357 mag load. 16 gauge. If you're looking for "magnum" 357 loads, Unique is not the powder to use. 28 gauge. You'll reach peak pressure before you get close to magnun velocities. 32 Auto.

357 Magnum Got them to …
10 gauge.

Loads for .357 Magnum: (Note: These are near maximum loads, you should use 10% less to start. In that regard, yes, Unique can be made to work ok in a light to mid range load in the .357 Magnum as it's one of the least picky powders around when it comes to tolerating light loads with no tendency toward pressure spiking, but it's probably not your best choice and it becomes a less best choice the lighter the load gets. If you want magnum loads, use 2400, H110, or 296. You can do well with medium velocity loads and you might be okay in working up a 125 gr. If you want faster than medium velocity loads, but not quite full magnum velocity, AA#7 is a very good choice. This information and data may vary considerably depending on many factors, including the components used, component assembly, the type of firearm used, reloading techniques, safety precautions practiced, etc. 20 gauge. 10mm Auto.