458 Socom Cast Boolit Data

[montanamike]

I recently built a 458 socom and started reloading for it using jacketed bullets. I didn't want to pay jacketed bullet price so I decided to try some NOE 460-405 rf hollowpoint they come out to about 335gr with my alloy. I decided against these boolits because they would have to be seated far too deep to not engage the rifling. So I went to accuratemolds.com and found a couple of designs specifically for the socom. I ordered a 4 cavity mold 2 of which were the 46-265s and the other two were 46-350s. The day I recived the mold I cast some up with an alloy of 93pb/4.5sb/2.5sn water dropped them then sized to 459 lubed with caranuba red and gas checked them. I couldn't find any data for this boolit so I took the closest data I could find and started working up a load.

This load data works well in MY rifle please use caution, start low and work up loads specific to YOUR gun.

accurate 46-350s:

This boolit came out to 343+/- gr after gas check and lube
the over all length with gas check is .914
COL is 2.060
using IMR4198

32gr = 1382 fps
32.5gr = 1415 fps
33gr = lost
33.5 = lost
34gr = 1444 fps
34.5 = 1478 fps
35gr = 1492 fps

There was no leading with any of these loads

35gr is the highest I loaded for that round and the groups were getting consistently smaller as the charge went up. The group I got with the 35gr load was 2.187 @100yds with open sights (I never shoot with open sights so I assume this would tighten up with optics)



The 46-265s I have not checked for accuracy or consistency I only loaded 1 round of each to check for pressure signs

46-265s with H-110:
boolit length .741
COL = 2.025

34gr = 1865 fps
34.5gr = 1732 fps (I'm assuming poor ignition)
35gr = 1955 fps
36gr = 1981 fps
36.5gr = 1991 fps
37gr = 2039 fps

There was no leading with any of these loads

none of these loads showed pressure signs

I will update this thread as I compile more data

If You have any CAST boolit data for the socom please add it here (theres a lot of data for jacketed) It would be nice to have all the data we can find in one place.

Thanks

Heres the pictures of the brass with the 46-265s:

http://i1142.photobucket.com/albums/n617/mtmike/Mobile%20Uploads/3654.jpg (http://s1142.photobucket.com/user/mtmike/media/Mobile%20Uploads/3654.jpg.html)

and the 265 next to the 350

http://i1142.photobucket.com/albums/n617/mtmike/Mobile%20Uploads/3662.jpg (http://s1142.photobucket.com/user/mtmike/media/Mobile%20Uploads/3662.jpg.html)

[Markbo]

Sweet. I have never shot cast in mine but have considered it a lot, thanks for the info. Have you put any data together for 100 yard accuracy with jacketed and comparable weight cast?

[ARgnubee]

I recently built a 458 socom and started reloading for it using jacketed bullets. I didn't want to pay jacketed bullet price so I decided to try some NOE 460-405 rf hollowpoint they come out to about 335gr with my alloy. I decided against these boolits because they would have to be seated far too deep to not engage the rifling. So I went to accuratemolds.com and found a couple of designs specifically for the socom. I ordered a 4 cavity mold 2 of which were the 46-265s and the other two were 46-350s. The day I recived the mold I cast some up with an alloy of 93pb/4.5sb/2.5sn water dropped them then sized to 459 lubed with caranuba red and gas checked them. I couldn't find any data for this boolit so I took the closest data I could find and started working up a load.

This load data works well in MY rifle please use caution, start low and work up loads specific to YOUR gun.

accurate 46-350s:

This boolit came out to 343+/- gr after gas check and lube
the over all length with gas check is .914
COL is 2.060
using IMR4198

32gr = 1382 fps
32.5gr = 1415 fps
33gr = lost
33.5 = lost
34gr = 1444 fps
34.5 = 1478 fps
35gr = 1492 fps

There was no leading with any of these loads

35gr is the highest I loaded for that round and the groups were getting consistently smaller as the charge went up. The group I got with the 35gr load was 2.187 @100yds with open sights (I never shoot with open sights so I assume this would tighten up with optics)



The 46-265s I have not checked for accuracy or consistency I only loaded 1 round of each to check for pressure signs

46-265s with H-110:
boolit length .741
COL = 2.025

34gr = 1865 fps
34.5gr = 1732 fps (I'm assuming poor ignition)
35gr = 1955 fps
36gr = 1981 fps
36.5gr = 1991 fps
37gr = 2039 fps

There was no leading with any of these loads

none of these loads showed pressure signs

I will update this thread as I compile more data

If You have any CAST boolit data for the socom please add it here (theres a lot of data for jacketed) It would be nice to have all the data we can find in one place.

Thanks

Heres the pictures of the brass with the 46-265s:

http://i1142.photobucket.com/albums/n617/mtmike/Mobile%20Uploads/3654.jpg (http://s1142.photobucket.com/user/mtmike/media/Mobile%20Uploads/3654.jpg.html)

and the 265 next to the 350

http://i1142.photobucket.com/albums/n617/mtmike/Mobile%20Uploads/3662.jpg (http://s1142.photobucket.com/user/mtmike/media/Mobile%20Uploads/3662.jpg.html)I use Lee 405 hollow base that I cast from reclaimed shot that I get from Rotometals. Brinnel Hardness is said to be between 18 and 23 but I have not checked it. I am not in the mancave right now so I don't have my data in front of me. I will try to add it later. What I can say is that the hollow base design works well in the SOCOM. I had issues with them at first and then found out it was my flash hider not the bullet. My flash hider was shaving the side of the bullets and I was getting patterns not groups. I swapped for a thread protector with a huge opening and my son sighted it in for me. I shot it today from 50 yards and took the red cap off of a milk jug,1 shot, no problem. I shot at an ax handle, "like a knuckel head" because I didn't expect to hit it. Now I need a new ax handle. If I can hit an ax handle turned sideways from fifty yards, I would say that is plenty accurate for me. I am planning to hog hunt and stop zombies with it. Any way, I cast these, load them up and shoot. No sizing or gas check. The base obturates nicely and I have no leading issues. I will try to get the powder data to you. I know I use Lilgun on the 405 hollow base and the 500 grain gas checks. I used 4198 on the 500's for a while and they shot fine but left unburned powder in the barrel and chamber badly enough to cause jams. I think a magnum primer would stop that so I bought some but havent tried them yet.Thanks for the invite. Hope that was helpful.PS. I don't think lee makes but 1 hollow base mold and it was designed for the 45/70 I do believe. My SOCOM just loves them.