CB with 458 SOCOM?

[tsubaki]

Has anyone come up with a 405gr cast bullet load using H110?

Or BL-C2 or IMR3031 or AA2230?

[pmer]

I've been using more Lilgun and 300mp with my 375 grainers. Have not done much medium speed powders.

[pmer]

So am I wasting this powder on the SOCOM lol.

http://imgur.com/a/qqB5vDz

Here is a group with 28.0 grains of SR 4759, cci 350 priners. Average velocity is 1581 fps with a SD 4.8! Best load combo I have found for this Mountain Molds 459-375 boolit so far. 80 yards, and relatively shootable at that speed.

http://imgur.com/a/KzPddwQ

[Webleylover]

So what does the process of affixing a check to a boolit consist of? Do I need any extra equipment to do it? (Besides the check of course)

Also, with the bottom of my bullets not being beveled, can I not check them? Can I bevel the bullet myself?

Thanks again for the info guys.

O.K., new here, but not new to casting. In order to properly gas check a bullet, the bullet itself has to be designed to take a gas check. As someone mentioned, the base of the bullet is of slightly smaller diameter then the main bullet body, enough so that a gas check will fit snugly. But, to crimp the gas check on the bullet, the bullet must be run through a lubri-sizer with the gas check pressed onto the bullet base. The lubrisizer is a device meant to size the diameter of the bullet to the proper diameter as well as making it more concentric, and also to crimp a gascheck onto it. Hope this helps.
I am new to the .458 SOCOM, picked up an AR in that caliber, and was thinking about using a gas checked bullet, considering that a plain based bullet might eventually deposit enough lead in the gas port to affect the functioning of the gun. Also learned that poly coated bullets like the Hi-Tec will eliminate that problem.
Glad to finally be on the forum.