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2400 in the .357 magnum

3K views 27 replies 18 participants last post by  Taterhead 
#1 ·
hi guys, checking to see if anyone uses 2400 in there colt .357 magnums .

any advise, many thanks,

please post.
 
#20 ·
Only if you shoot less than about 1700rds??:cheers:
 
#4 ·
I asked a similar question a few years ago when I took the plunge into the wonderful world of wheel guns.

A couple guys here said "try 2400, work your loads up and give it a little crimp to hold it all together.

Been using 2400 since then and haven't looked back. I use it for 357 mag with 6" barrel, 4" barrel, with 125gr, 140gr and 158gr.
A nice flexible powder for the 'ol 357.
 
#6 · (Edited)
gotta agree with what's been posted so far, its the powder for experimenters in mag calibers, like said earlier, not an all or nothing like other powder and in my opinion, the goto powder for cast bullets in magnum cartridges, been using it for almost 30 years.
 
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#12 ·
For some reason some people became convinced you need a magnum primer to ignite 2400, as with 296. But not true, and Keith was pretty clear about that. I started using it around '70.

Anyway, 2400 on hand is better than 300MP located on inter-plan-et Unobtainium. Plenty of horsepower to be had for most purposes with 2400. Whether "improved" or old stuff.
 
#17 ·
There are significant pressure differences. This was brought to light.......thinking 20-30 yrs or so ago......might have been Scovill or Pearce. Do not use Keith's data substituting magnum primers. Manuals often specify magnum primers with significantly reduced powder charges of 2400.

Tough to quantitate the effect on velocity. Personal experience with .44 Mag suggests well over 100 fps variance is quite possible. That was before people started talking/writing about this.

Interestingly, recently witnessing a similar "rethink" with the Hornet. Some sources deciding small pistol primers are best. OK, but pay serious attention to powder charge data.

Suppose I sound parental, but blithe component swaps have resulted in interesting threads.
 
#18 ·
2400 is my go to powder for hotter loads in any of my 357mags. It is more forgiving than H110/W296 & doesnt require a mag primer.
 
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#19 ·
hi guys , just a thought wonder what the difference in velocity would be between 2400 with standard or magnum primers ??

just a thought
There can be a significant diff in vel/pressures going to a mag primer with slower powders. So dont just plug & play.
 
#23 ·
2400 has been my go to for .357 and .44 magnum for decades.

If memory serves me, it's the second powder I ever bought, to load 158 gr .357 loads.

Unique was first. :)
 
#25 ·
The 2400 has a wide loading range. The load data in the Lyman 1970 manual loads well over what is published today. Using a different Lyman manual, 17.7grs is the factory equivalent of 125gr bullets.

Some years ago I tested the Lyman factory equivalent and under the Arizona sun, I could see muzzle flash and air compression...4" barrel.

I'm also a fan of the AA #9, fast with less powder and is very accurate in 357mag and 44mag, should be the cats meoow in 41mag. :)
 
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