I simulated use of Trailboss also to see if it would be suitable (since I use Trailboss for subsonics in 308 and 338 Federal). Powders like HS6, Bullseye and AA#5 will give 100% burn in the 16" barrel. It would be better to use a faster powder for subsonics with 300gr and 350gr bullets.ģ. The 4 powders will work for subsonics but the %Burn in the 16" barrel is nowhere close to 100%. The 4 powders are good choices for optimal Velocity for the lighter bullets, but may be less desirable for subsonic loads for these light-for-caliber subsonic bullets (when others are looking at 450gr to 600gr subsonics in 458 Socom). Varying the seating depth slightly at that point could give you smaller group size.Ģ. I seated the bullets in the simulation with 0.300" to 0.318" of bullet shank in the neck of the brass, and you have a little to play with that seating depth once you've developed the loads for correct velocity. So, da bugman could use a 45 pistol can for subsonics only. MP is muzzle pressure, which is very low for all 4 powders, below the normal range for a pistol can on a pistol (2000-5500psi). I added the information about %Fill and %Burn because it affects the decision on using the powders, where %Burn is for the 16" barrels. The closest I could get was a Lee mold 340gr bullet which I used for the data below, since it would be close.ġ. The Rem bullets are in the Quickload database but the Cheycast bullets were not. He has Remington 300gr jacketed HP bullets with lead nose exposed, and 350gr Cheycast () cast RNFP bullets. Da bugman PMed me and asked me to do a Quickload simulation for 458 Socom subsonic loads using the 4 powders below.
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