What are your thoughts on Alliant 300 MP?

F

Frankly

New member
I ask because Midsouth has it available. I have most of my powder bases covered, with the exception of one for maximum magnum loads. I was unaware of this powder until now. Not much load data to be found. Research turns up comparisons to H110. In a couple forums people have claimed it is a rebranded H110, but what little load data I've found suggests otherwise. Anyone here used it? Anyone a believer? Should I get it while I can or patiently await H110?
 
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My 300 BO likes it. Never used it for anything else.

I later found H110 and Lil Gun. It sits for now.
 
I think it's only good for full throttle magnum loads. But I have W296 for that - which a pound lasts me about four years.

But I'm sure it's good for what it does. Alliant powders tend to deliver the goods.
 
I use it on .357, 41, and 44 Magnums. There is adequate load data available, starting with Alliant's. My choice has been to use magnum primers with it.

I would say it has a wide range of loads compared to H110/W296, which I gather is pretty much an all or nothing load, or virtually so.
 
I've got a pound and just ordered a few more off MidSouth. I've only used it in the 454 so far but I can tell you that it's very consistent and burns very clean, I was astonished how cleanly it burnt. It shows to be slightly slower than even H110/W296 and LilGun so it should be a beast of a powder. I'm going to start trying it out in the .41 Mag too.
 
I see H110, W296 (the exact same as H110), and 300 MP as being "the same." 2400 is still more accurate, even if I lose 50-100 fps at the top end.
 
I dont think 300MP is the same as H110. FOr one it does better with standard primers than with magnum primers (look at the Alliant load data). If any thing Id day its slower than H110. It works great in my 357/44 magnums. I still love H110 and 2400 but 300mp is a great powder as well.
 
I see H110, W296 (the exact same as H110), and 300 MP as being "the same."
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Too much energy has been spent on that debate. I would just go with the published loads, which are not the same.
 
I found an article which said 300-MP may be St. Marks cannister 297 with an added flash suppressant, so just very slightly slower than 296/H110. In the author's test of 44 mag loads, 24 gr of 300-MP produced the same velocity as 23 gr of H110.
 
The load data I find gives 300 mp a load range between 2-3 grains, whereas the load range for H110 seems limited to 1 grain, and all the reports I read suggest that H110 is very unforgiving of any variance. Doesn't this suggest 300 mp is a more versatile powder? And in terms of maximum magnum loads, the 300 mp does top the charts in the Lee book in a couple of common bullet type/weight categories... I am wondering whether this powder might not be superior to H110 for max magnum loads? If you have used both, how do you characterize the two powders head to head?
 
reports I read suggest that H110 is very unforgiving of any variance.
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It prefers to be loaded in a tight range, yes.

Doesn't this suggest 300 mp is a more versatile powder?
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Yes it does. But consider this: for the purpose, what's the point in having more versatility? Once you're loading with powders of this burn rate range, you're going full power anyway. Load 'er up. Go full power. What is there to gain from varsatility?

This is not to discourage from purchasing PP 300 MP. I'm just saying that versatility isn't an important characteristic for the type of loading for which these slow powders are purposed. Base your decision on other more important factors.
 
Looks to me like its Alliant's answer to 110/296. Not the same thing, but accomplishes the same thing.

The one answer I have searched for, and not found is whether it is unsafe to reduce loads in MP-300 as are 296 and 110.
 
Nick_C_S's experience notwhithstanding, I have found loads with 300-MP quite adjustable for the level of drama one prefers in their magnums. I have worked in whole grain increments and could tell the difference and easily draw my conclusions. I have never probed the limits of what the gun or I could stand, just the shooting experience I preferred. I expect some excitement when the gun goes off, shoot well with it, but don't like getting beat up by the gun.
 
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