Elder Bruin
New member
- Location
- Fort Saskatchewan, AB, Canada
Greetings,
I am working on a +P load for my new Ruger 5 1/2" Blackhawk in .45 Colt.
Based it on some data on handloads.com. as follows:
300 grain JSP
19.5 grains Alliant 2400
1166 FPS velocity @ 19.5 grains (suggested starting load 17.6 grains)
30,000 CUP pressure
(From Hodgdon #26 Reloading Manual)
I loaded a test cartridge as follows:
300 grain Hornaday XTP (loaded using bottom crimp goove for maximum internal volume)
OAL = 1.64"
17.0 grains Alliant 2400
Starline .45 LC casing once-fired trimmed to spec
CCI 300 LP primer
crimped well
I'm not looking for a maximum result here. I just want to achieve around 1000 FPS and around 25000 CUP, which should result in around 1300 FPS from the Marlin rifle.
Since I knew that the round would be safely under 30,000 cup, I test-fired it. It chambered easilly. Recoil, one-handed, was similar to a 5 1/2" Ruger Blackhawk in .41 Magnum with factory loads I once fired. Extraction was easy and no different than 800 FPS / 250 grain factory loads. Primer flattening was slight, not much different than factory.
What I need to know is a better idea of velocity and pressure. (best estimate is that it IS around 1000 FPS and 25000CUP.)
Does anyone have Quickload and can calculate these for me?
Alternately, does anyone have reloading manual data or chronograph data for this or a very similar loading?
Thanks for your help.
I am working on a +P load for my new Ruger 5 1/2" Blackhawk in .45 Colt.
Based it on some data on handloads.com. as follows:
300 grain JSP
19.5 grains Alliant 2400
1166 FPS velocity @ 19.5 grains (suggested starting load 17.6 grains)
30,000 CUP pressure
(From Hodgdon #26 Reloading Manual)
I loaded a test cartridge as follows:
300 grain Hornaday XTP (loaded using bottom crimp goove for maximum internal volume)
OAL = 1.64"
17.0 grains Alliant 2400
Starline .45 LC casing once-fired trimmed to spec
CCI 300 LP primer
crimped well
I'm not looking for a maximum result here. I just want to achieve around 1000 FPS and around 25000 CUP, which should result in around 1300 FPS from the Marlin rifle.
Since I knew that the round would be safely under 30,000 cup, I test-fired it. It chambered easilly. Recoil, one-handed, was similar to a 5 1/2" Ruger Blackhawk in .41 Magnum with factory loads I once fired. Extraction was easy and no different than 800 FPS / 250 grain factory loads. Primer flattening was slight, not much different than factory.
What I need to know is a better idea of velocity and pressure. (best estimate is that it IS around 1000 FPS and 25000CUP.)
Does anyone have Quickload and can calculate these for me?
Alternately, does anyone have reloading manual data or chronograph data for this or a very similar loading?
Thanks for your help.
