458 socom done right

[oldatheart]

Had this 545 grain mold cut by Tom at accurate
And a 350 grain in the same mold.
It shows no signs of leading and good starting accuracy at 50 yards. I accidentally shattered a fence post in the distance test firing. But it was a cool sight. Ps it kicks like a mule.

 

[Brad]

It might not start out fast but something that heavy isn't gonna stop fast either.
How fast were they going?

 

[oldatheart]

The 545 were on the edge of supersonic and the 350s were loaded with 37.5 grains of re7 well into supersonic. The 37.5 load is very stiff. I would work up to it and start around 34 grain. I was using starline brass. However I used large rifle primers not pistol. This load was not a general use load. All disclaimers aply.

 

[Brad]

A 545 at 1100 fps is something to be reckoned with. Got photos of the rifle?

 

[Ian]

Holy cow. 545 grains at the speed of sound, as fast as you can pull the trigger, for what is it? Nine rounds in a 30-round Pmag? Basically it's a 300-yard-accurate 12-gauge that doesn't lose energy nearly as fast.

 

[oldatheart]

I'll get photos soon. I had Bob out tonight and he was Impressed. He kept saying it's like a full power 45/70!
The host is a carbine length AR. With. Mi 15 inch rail, and a Fixed A2 stock. I have a feeling it might break a collapsible one.

 

[Pistolero]

Ouch! My Marlin .45-70 with a 140 gr lighter bullet at a bit faster speed, and 8lbs plus
gun wt is a real solid kicker. In an AR, I think it might be pretty unpleasant. Push that
bad boy up a bit and you can hunt elephants with confidence.

 

[Ian]

I wanna see pictures of the carbine!

 

[JWFilips]

I had a chance to shoot one of those last month Ouch! indeed !…….darn near took my shoulder across the parking lot! Amazingly however the 3 shots I fired clover leafed at 50 yds
Accurate caliber