Since 458 SOCOM load data is hard to find and A.R. 15 style rifle’s are new to me I thought I would start a thread to get some discussion going on this subject. I hope to compare notes with a few of you guys and possibly spread more information about cast bullets and the 458 socom. I knew from the start that I couldn’t afford to shoot factory ammo through this rifle so reloading was the answer, particularly cast bullets.
I am shooting a Tromix 16” upper assembly purchased complete from the company. Palmetto lower receiver and hyper fire sharpshooter trigger.
I cast up some bullets with the 458 300 grain flat nose from RCBS. My Alloy is 75% wheel weight and 25% range scrap water quenched. Everything has been sized to .459 with White label lube 50-50 beeswax.
Powder of choice is Reloader 7 since I have a few pounds and seemed like it fits the bill with CCI 300 primers.
My questions to start off with are as follows:
Has anyone had problems with fouling in the gas tube from lubed bullets?
Since chamber pressure is around 35,000 PSI how do I look for pressure signs on the primer rated for much higher than that? From what I understand by the time you see pressure signs on a pistol primer you have exceeded the working pressure of an AR.