There isn't much data for the 500 Jeffrey, and I haven't seen any for reduced loads with cast bullets. The only thing I found was for IMR 7828, 100 grs drives a 570 gr 1650 fps.
I'm looking for a load that will drive a 600 gr cast 1700-1800 fps with near 100% load density. The bullets will be loaded below the neck into the case by ~.25"
I'll likely start with the 7828 data from the A-sq manual, but would like some other powder options.
Posts: 7213 | Location: Alaska | Registered: 27 February 2001
Paul--I think one of the reasons for no response is that quickload doesn't really work up loads for cast bullets. I don't have any experience with them myself--what parameters would we use to make the jacketed bullet info be what you can use??
Posts: 2002 | Location: central wi | Registered: 13 September 2002
I believe that cast bullet loads are very close to jacketed loads. I know I'm looking at mild pressures, so even if the pressure is 5k higher then calculated, I'll still be 10k under max pressure, if not more.
Thanks
Posts: 7213 | Location: Alaska | Registered: 27 February 2001
OK--i hope you can use this--I asked quickload to find us something going 1900 fps with a 570 woodleigh in a 500 jeffrey rimless. I figured about 1900fps cause I thought the cast bullet would be slower. Note fill ratio's are pretty ideal for such slow powder AND pressure is very low.
RE25 89% fill 117.9 grains 25K press.
h4831sc 85% fill 117.1 grains 27K
I7828 88% fill 115.4 grains 26K
H1000 91% fill 124.9 grains 27K
By the way--as a cross check I asked quickload how fast that 570 woodleight would go with 100 grains of 7828 and it forcast 1638 fps--thats pretty close to the data you mentioned. Hope this helps
Posts: 2002 | Location: central wi | Registered: 13 September 2002
You did good work my friend! It looks like any of those slow burning powders is fine for a reduced load. I personally like H4831sc myself. Have fun guys!
Posts: 1002 | Location: Midwest USA | Registered: 01 September 2001
