357 Magnum revolver problems

[FOTIS]

Hey guys I've got a Smith & Wesson from the performance center it's a 327 8 shot with a 5-in barrel. No matter what loads I have put into it so far it's always very very slow. I tried the 125 XTP with 19.4 grains of little gun and it gave me 1,200 ft per second. It shoots the 158 close to a thousand feet per second. Any idea what's going on cuz this thing's going to drive me nuts.

I've seen huge variations in velocity when it comes to rifles but never ever in a revolver.

 

[salmonchaser]

Forcing cone clearance? Heavy crimp, small pistol magnum primers, and a slow burning powder, not much else to into it. That is a huge drop in velocity. Should be pushing 1500 I should think.

 

[FOTIS]

That's what I thought too....

 

[truck driver]

Got any 2400? That might help speed it up. Coming from the Performance Center the cylinder clearance and forcing cone should be good to go. But now adays you never know coming from Smith & Wesson.