Well, I finally got to the range yesterday. I did not have as much time as I would have liked and I had a couple Handis to sight in.
First off, I only had one 500 load with me. (Don't even ask why....) But I am glad I had that! Here is how it went. Accuracy was as expected, about an inch at 50 and right at 2" @ 100. Recoil stiff as compared to my 12ga ultra and 45-70 fired right after. While it was LESS than the 12 ga buckhammers, 1.25 OZ @ 1500 fps. it was MORE than the 45-70, 300 hp's @ 1900.
Here is what hodgdon said about my load:
500 S & W MAGNUM
CASE: STARLINE
BBL: 10"
PR: WINCHESTER LR
TWIST: 1:18"
TRIM: 1.615"
350 GR. HDY XTP (Maximum Loads)
DIA. .500
COL: 1.985"
H4227 42.5 1863 49,900 PSI
H110 43.0 1877 50,600 PSI
(Start) LIL'GUN 35.0 1697 41,500 PSI
(Max) LIL'GUN 42.0 1912 48,100 PSI
Longshot 23.0 1602 50,000 PSI
Titegroup 18.5 1461 50,000 PSI
Here is what I loaded:
Here is/was the velocity:
SO, if you figure the estimated velocity would be about 1800 fps, I netted a increase of almost 300 fps for the longer barrel!! WOOHOO!!
I really need to get back down the the other loads and see what I get with them. But with that load I about duplicated the specs for the 450marlin with a bigger dia bullet. What will I get with more powder? I don't think I will load this one any hotter. Just looking at primers, (not scientific) it was a nice load.
I will get more data ASAP, had to pass along how it went.