Looking for 300mp published load data for .44 mag

[Schwing]

I have some .44 mag Missouri 240 grain JSPs that I would like to reload with 300mp. On their website, they only list 1 load of 25 grains for speer gdhps. I am assuming this is the max load but...

I am hoping someone has some published data for 240 grain jacketed bullets that might have a min-max range.

Another question. I have a Hornady 9th edition on order but don't have it yet. Can someone who has one tell me if there is any published data in it for 300 mp and lead for either .357 or .44? I have heard that it has some pretty thorough load data for 300mp.

Thanks guys!

 

[blarby]

Hornady 9th:

44mag
240g Jacketed
300mp
19.8-25.6g

not listed for lead

.357
125gr Jacketed
300mp
8.1-20.4

158g Jacketed
300mp
14.-17.0

not listed for lead

 

[Schwing]

Thanks! You are a scholar and a gentleman.

 

[NCsmitty]

If you take note, you will see at the initial warning page of the website, the line that says "REDUCE RIFLE AND HANDGUN CHARGE WEIGHTS BY 10% TO ESTABLISH A STARTING LOAD."

I would believe that there are better powders for use with lead bullets in magnum pistol cases.


NCsmitty

 

[High Plains Drifter]

Try Alliant's website

 

[Schwing]

To date, I have found no actual published lead data for 300mp. There are lots of better powders for lead. but getting them, unfortunately, is the hard part.

 

[Schwing]

Ya... They have one load published for each bullet size. They don't even list a min or max.

 

[NCsmitty]

As you surmised, Alliant's website lists maximum loads only, unless otherwise stated. They allow you to determine the minimum (starting) load by reducing the maximum load by 10%. 300MP is Alliant's answer to Hodgdon H110/Win296.


NCsmitty

 

[RealGun]

blarby
.357
125gr Jacketed
300mp
8.1-20.4

Guess you meant 18.1-20.4g

 

[RealGun]

300MP is Alliant's answer to Hodgdon H110/Win296.

Marketing maybe, but one should not think of it as "same as" or sharing loads with H110/W296. 300-MP does not use magnum primers but it can fill cases and can develop high velocities within standard pressures. Its results and shooting experience are a step above A2400.

 

[RealGun]

Brian Pearce's references to PPro 300-MP, including loads for .45 Colt and .357 Magnum, in the April-May 2012 Hand Loader magazine list lead bullets with gas checks.

 

[seh]

I was just reading in a recent gun mag (think it was guns and ammo) that H110, W296, and 300MP are all the same powder. Anyone else see the article?

 

[RealGun]

I was just reading in a recent gun mag (think it was guns and ammo) that H110, W296, and 300MP are all the same powder. Anyone else see the article?

Not likely, since PPro 300-MP clearly does not require magnum primers.

How about going and getting the actual references for that article? Unsupported rumors are not the discipline of a reloader.

 

[seh]

It is in the December issue of Guns and Ammo on page 28 if you would like to research it. Says all 3 are made in the same plant "St Marks" in Florida and labled for the different manufactures.

 

[NCsmitty]

Marketing maybe, but one should not think of it as "same as" or sharing loads with H110/W296.

300MP data shows similar velocity levels as H110/W296, but at no time was comparable load data expressed or implied, but it would not surprise me that they all come from the same manufacturer's facility. That's yet to be determined.


NCsmitty

 

[RealGun]

I ordered and received the magazine issue and it does indeed say that W296, H110, and PowerPro 300-MP are all the same powder, made at St. Mark's in Florida. One would logically conclude that they all should share the same load data...that one in search of loads for PowerPro 300-MP could/should use data for W296 or H110.

One could also conclude that they all require the same type primer, which I believe would be Magnum pistol, despite some information that claims PowerPro 300-MP can or should use regular primers.

 

[gamestalker]

You can go to Alliants website and have their current loading manual shipped out to you for free, or use it online.

GS

 

[RealGun]

You can go to Alliants (sic) website and have their current loading manual shipped out to you for free, or use it online.

Yes, but that will get you only one load per caliber per powder and few choices of bullet. That's why these questions about 300-MP come up.

Meanwhile, non-powder company lists of .44 Magnum loads are full of references to either W296 or H110.

I currently use 21.7g 300-MP with 240g SJSP with plenty of room to go hotter, if I wanted to shoot more than 2-3 rounds in an outing or hunt. The max load is 25.0g.

I use 20.7g with 240g LSWC. That is not science yet but is a satisfactory shooting experience. It corresponds to the starting load for H110/W296 for XTP.

 

[Schwing]

I ordered and received the magazine issue and it does indeed say that W296, H110, and PowerPro 300-MP are all the same powder, made at St. Mark's in Florida. One would logically conclude that they all should share the same load data...that one in search of loads for PowerPro 300-MP could/should use data for W296 or H110.

One could also conclude that they all require the same type primer, which I believe would be Magnum pistol, despite some information that claims PowerPro 300-MP can or should use regular primers.

I am questioning using non-magnum primers after my experience this weekend. I had some 158 grain JSPs and loaded them with 15 grains (minimum is 14 according to hornady 9th ed.). I had 2 in a row that failed to ignite properly leaving me with a bullet stuck in the barrel each time. I know they were not squibs because I hand measured the charges in the 15 or so that I loaded. They also had a lot of unburned powder still in the case. When I got home, I pulled the rest and they all had 15 grains in them.

It was cold but not extreme cold. I think it was about 20°. Either this stuff is really cold sensitive or standard primers just don't cut it. I have some heavier loads but have not tested them yet as I didn't feel like pounding that second round out at the range. I will find out this weekend. If I get more of the same, I think I will be done with this powder.

 

[buck460XVR]

I am questioning using non-magnum primers after my experience this weekend. I had some 158 grain JSPs and loaded them with 15 grains (minimum is 14 according to hornady 9th ed.). I had 2 in a row that failed to ignite properly leaving me with a bullet stuck in the barrel each time. I know they were not squibs because I hand measured the charges in the 15 or so that I loaded. They also had a lot of unburned powder still in the case. When I got home, I pulled the rest and they all had 15 grains in them.

It was cold but not extreme cold. I think it was about 20°. Either this stuff is really cold sensitive or standard primers just don't cut it. I have some heavier loads but have not tested them yet as I didn't feel like pounding that second round out at the range. I will find out this weekend. If I get more of the same, I think I will be done with this powder.

Schwing....was this with 300MP or H110/W296? I was under the impression Hornady used SPM primers with all of it's .357, 158gr loads.

 

[Schwing]

This was with 300 MP. One of Alliant's selling points about this powder is that you don't have to use magnum primers. If it really is the same powder as H110/W296, that is kind of a problem I would think.