Don't read too much into this, but have any of you ever seen or heard of someone making a SBR AR in .458 SOCOM?
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Don't read too much into this, but have any of you ever seen or heard of someone making a SBR AR in .458 SOCOM?
I met a guy at SHOT who appeared to be the authority on .458 Socom.
He had uppers, custom ammo, and even cans, all optimized for .458 Socom. I'll see if I can find his card.
My buddy built a TC Encore in .458. He bought some very very heavy .458 loads (I'm thinking 400 gr) that were subsonic. They were pretty quiet considering the .45" exit aperture on the can.
Don
Can you run subsonic 458SOCOM through a 45 can?
A 458 SOCOM suppressor that would work for subsonic and supersonic is probably the best choice. I'm not selling anything, so the info below is just the facts as I see them.
Using the Quickload program to simulate your scenario....
10" barrel, 25.4gr RL-7
500gr bullet, chamber pressure-- ~25,000psi, muzzle pressure-- ~4715psi
300gr bullet, chamber ~10,000psi, muzzle ~3416psi
16" barrel, 25.4gr RL-7
500gr bullet, muzzle ~2823psi
300gr bullet, muzzle ~2216psi
Conclusion:
A commercial 45 ACP suppressor is made to operate in the muzzle pressure range of 2500-5500psi based on the muzzle pressures for a 4-5" barrel handgun. A 458 SOCOM commercial suppressor that can handle subsonic and supersonic would be built for a muzzle pressure range up to 10,000psi (or maybe 12,000psi).
Therefore, a commercial 45 ACP handgun suppressor on a 458 SOCOM (subsonic only) with either a 10" barrel or 16" barrel operates within the muzzle pressure of the suppressor design. Subsonic only should pose no danger at all to the suppressor.
The powder is burned in the barrel, so the argument of more powder or higher pressure because it is a rifle is a false belief/statement. The muzzle pressure is what counts in regards to a suppressor.
That said, the Quickload program shows that Reloder 7 only has about 85% of propellant burned in a 10" barrel with a 500gr bullet; and 55% of propellant burned in 10" barrel with a 300gr bullet. It would seem to me that a faster burning powder is more appropriate to get 100% burn in the barrel. Even with a 16" barrel, the simulation for Reloder 7 shows 89% burn for 500gr bullet and 62% for a 300gr bullet. I suggest something slightly faster like Hodgdon H110 (or VV N110) since it has a 94% burn in a 10% barrel for a 500gr bullet (62.6% case fill, where ~22gr should give you about the same subsonic velocity as 25.4gr of Reloder-7). VV N110 is slightly faster than H110 and for the same 500gr bullet at subsonic velocity, it gives a 99% burn rate in 10" barrel (~19.5gr of VV N110 with 72% fill, should give the same velocity as ~22gr of H110 or 25.4gr of RL-7).
I use VV N110 for 338 Federal subsonic using 300gr bullets and that powder works very well. It's a stick powder.