Alliant 300MP powder

Hook686 · #1 12-09-2010, 01:03 AM

This is shown on the Alliant web page for 158 grain GDHP to yield 1686 fps in a 10" barrel. Has anyone used this powder in a 4", or 6" barrel revolver ? How about a Marlin carbine ?

Quote:

Power Pro™ Series
Introducing Power Pro™ - a series of canister spherical powders engineered to provide the ultimate performance for pistol, light varmint, and light/medium/magnum rifles. Power Pro delivers improved velocity and density for more efficient reloading and helps reloaders duplicate certain factory loaded ammunition. They are an excellent addition to Alliant Powder’s existing lineup of proven and trusted propellants.

Features & Benefits
• Manufactured in the USA
• Improved velocity and density for more efficient metering and loading
• Designed for magnum pistol, light varmint and light/medium/magnum rifles
• Enables reloaders to duplicate certain factory loaded ammunition
• Designed for specific cartridges and applications
• Density designed for proper cartridge fit

Paul5388 · #2 12-09-2010, 01:47 AM

From another forum:

Quote:

I used two different guns, a Ruger Blackhawk with a 4 5/8 inch barrel and a Ruger Sp101 with a 3 inch barrel to fire the test loads. Upon firing the loads they didn't seem any more powerful than loads I have fired from these guns in the past, at least going by felt recoil. Time for the chrony results. Remember Alliant lists this powder as hitting 1,686 fps with a max load with a 158 grain bullet and using a 10 inch barrel. Once again my load is:
Winchester .357 mag brass
laser cast 158 swc
17.5 grains of 300 mp
cci small pistol primer
I knew since I was only using shorter barrels today I wouldn't hit Alliants claimed velocity. I did believe that if Alliants claims were true I should see velocity in the 1,300 fps range or so.

Ok, without further ramblings here are the chrony results.

Ruger Blackhawk 4 5/8 inch barrel.
Shot 1: 1,170 fps
Shot 2: 1,121 fps
Shot 3: 1,231 fps
Shot 4: 1,173 fps
Shot 5: 1,152 fps
Average velocity: 1,169 fps
Standard deviation: 40 fps
Average deviation: 26.3 fps
extreme spread: 109.6 fps!

Ruger Sp101 3 inch barrel
Shot 1: 1,127 fps
Shot 2: 1,162 fps
Shot 3: 1,121 fps
Shot 4: 1,181 fps
Shot 5: 1,147 fps
Average velocity: 1,147 fps
Standard deviation: 24.7 fps
Average deviation: 19.1 fps
Extreme spread: 59.5 fps

As it stands right now this powder wouldn't be my first choice for max velocity. In fact in the past using the same amount of Lil gun powder and this bullet I have seen velocities nearly 100 fps faster than today's results out of the same guns.

ArchAngelCD · #3 12-09-2010, 05:38 AM

Thanks for the data and report Paul...

threefivesevenheaven · #4 12-16-2012, 01:43 PM

wewll I gotta ge a chrono, quit playing around and work up a max load, mp 300 is like vastly improved 296, truly wqorks better in my 6 inch and snubby, speed seems better but cant say without chrono, cleaner less flash, nowhere near as loud, makes a mess of whatever youre huntin

Skip Sackett · #5 12-16-2012, 02:44 PM

I was UNDERimpressed as well. There is no way to get enough of it in the case to make it any better than H110/W296 or my MILSURP powder, WC820.

I was using it in 44Mag with 240gr XTPs. I will have to dig up the results but, I didn't fine one thing it did better than any of the other powders I have used for years and years......FWIW