I'm looking hard at a 570gr gas check mold for my 500NE. Does anyone have reduced loads for it? I don't recall where but I saw recently someone listed a pistol powder for gallery loads with the 500NE.
Let's see what you're working with.
TIA

We use pistol powder for all reduced loads.

Never tried this cartridge, but for a 577 T.Rex I use 45 grains of UNIQUE.

You need to add some KAPOK on top of the powder.

Look for some data for the 50 Sharps 3.25 cartridge. Lots of data out there, from pistol powder to black powder. Those will not regulate though.
Now, here is what I do with my 500 since I will never get to go to get a Cape buffalo (my goal since age 8). I use Hawk 450 grain bullets, a foam backer case filler, and some 5744, the amount of which I will look at if you want.
This load shoots into two inches at 50; one of those regulatory nodes thing that works.

If you can find some Trail Boss it is very easy to find starting load. I use it for reduced cast bullet loads in .470NE and .505 Gibbs.

Today the best powder for really reduced loads is Reload Swiss RS14.

For something moderate, AA 5744 is hard to beat.

Can do some QL calculations for you, if you want.

Jiri

I just reloaded reduced loads for both the 505 Gibbs and 500 NE using 5744. My lead/ gas check bullets come from the Bull Shop, and they have work well.

I am out of town until Friday- I will post my load data and the weight of the 500s

Regards,
Jack

To get reduced loads to regulate, the usual formula is to use the same weight of the same powder as for the standard, heavy bullet, but with a projectile three-quarters of the mass.

I guess a 450-grain bullet would be close enough.

You can use any pistol or shotgun powders for reduced loads!

Back when I was just getting to know my .500 NE and was new to DR shooting...I used two practice loads:

Jamison brass, CCI 200 primer, Cast Performance .510-500 (actual average ~ 528grs), AA5744 (of current manufacture)

40grs = 1409fps no pressure recorded (too low to move metal and affect resistance of the strain gage.
45grs = 1553fps same
50grs = 1705fps 23,300psiM43
55grs = 1806fps 25,900psiM43
60grs = 1986fps 32,100psiM43
65grs = 2125fps 38,900psiM43
65grs = 2115fps 38,900psiM43
65grs = 2094fps 36,900psiM43

It wouldn't bother me to go up another couple grains if that is what it takes to regulate. Pressure work done by Mike Brady -- original owner of North Fork.

Plinker load:
450 Woodie, 80 - 86 grains R-15, full Kynoch wad (or 5/8" foam backer rod cut to length) ~1900 fps

I shoot only R-15 for full-house loads.