primers for alliant 300-mp powder

[woody wood]

im going to load 357 158g jhp with something new-alliant 300 mp powder.
only have alliant load guide to go off of.in the past they have always listed
cci primers but on this powder they list federal primers.and state using other
primers can change charge.--well i understand that-its common sense!
i know to work your way up. i want to know why federal(100) instead of cci(500)? both are small pistol primers-not magnum.
note:i have on hand federal spm primers and cci sp primers.

[woody wood]

by the way,anyone tried that powder or have any good loads with it in any
caliber?i love hot loads!

[PawPaw]

Interesting. I'd never heard of that powder until I read this post. I use L'il Gun in the .357 magnum and this powder looks like it was formulated to compare with L'il Gun.

Thanks for the heads-up.

[Poodleshooter]

Tag me as interested as well.
I can't run 296/H110 through my measures (binds the drum), and 2400 doesn't deliver top velocity, so I'm looking for a replacement powder for .357 and .44Mag.

[woody wood]

loaded up some 357 158 gr montana gold and 44 m with 300gr nosler this weekend and will give some updates later this week.loaded close to max along
with same set up with 2400 and h110 neer max loads.
used cci standard pistol primers with all but h110-used cci magnums.
dont have a chrono so will not be able to give real info.i should get one!

[Crashbox]

I'm curious as well how it performs since I bought a pound of it a couple of days ago but haven't tried it yet...

I read somewhere that it is similar to H110 but a flash-suppressant is added...???

[woody wood]

update from range-
i did 357 loads in ruger gp100
cci sp primers with 17.5 and 17.9 of 300 mp and seem to shoot very acurate.
17.9 was a nice hard load with slight primer marking but ejected fine,not sure
how much further i would go? both loads had more powerfull recoil than
my h110 load with 14.5 and a fed sp mag primer.
sorry no chrono-so thats all the info i can give.
also did some 44 loads with 300g nosler 18.0 gr of 300 mp with cci lp primers
and had nice accuracy .no pressure signs.

i like powder for 357 but i like my 44 loads hot,i may have to work up to see what this powder can do,but i dont feel that it will be as good as h110 or
2400?powder is very fine and may try to work up loads with hotter magnum
primer.it seems that with the 44 loads of mp 300 that their was unburned
powder. (44 loads tested in 7.5 ruger super redhawk.)

i wish someone could do a test and give all of us some better info thaan i did.

[SRH78]

This powder has definitely peaked my interest. I may work some loads up in it in the near future and I do have a chrono. I am particularly curious how it will do in a 454 and in a 357 rifle. It seems to me that it would do very well in the rifle, in particular.

[Gdawgs]

I've held the powder in my hands a few times and almost bought it, but since there isn't any load data out there (other than Aliant's worthless website), I decided to wait until one of the loading manuals(Lyman should be due for another one sometime soon I would think) comes out with a new edition. Hopefully they will include this powder.

[TMD]

300mp has been out for over a year now and there was even a few magazine articles touting it but other than that there hasn't been much hoopla written or spoken about it. The lack of any real talk about it should be enough to tell you that it hasn't caught on all that well. Its very doubtful that it will ever put a dent in H110/296 or 2400.

[jmortimer]

^ We shall see. Alliant, like most powder manufacturers spends little money on advertising, so 300 will have to make it on its own merits.