throat specs for a SRH 454

[irold]

I have a SRH in 454.  Does anyone know Rugers spec on the throat diameters ?  I've mic'ed the throats and slugged the barrel....now I need to know if its within Rugers specs.  Or what one should be compared to the other .
 
Thanks ,
 
regards , irold

[anachronism]

Rugers specs are irrelevant in comparison to the actual physical relationship between the two. Using a caliper (if that's how you measured them) to measure cylinder throats is futile. The throats must be slugged too, and the slugs measured with a good quality micrometer, calipers are too sloppy for this sort of thing. Ideally, the throats should be a couple of thousandths larger than the bore diameter, and if you're shooting cast bullets, the bullets should be sized at or slightly larger that the throat measurements. Generally, if you can push a cast bullet through a cylinder throat by hand with only moderate resistance, without having to pound it through, your sizings about right. Jacketed bullets are more forgiving, which is good because you really can't do anything about them anyway. I take it you're having a specific issue though. What sort of problems are you experiencing?

[irold]

Seems as though on most all my targets....there's always 3 holes clustered fairly close and 2 that are together left and high.  Was thinking , I may have a couple of cylinder holes that are out of whack , misdrilled , or who knows ?  I did number the cylinder bores , appeared as though numbered 2 , 5 , and 6  would give me one POA , and 3 and 4 another.  Was shooting 5 shot groups....The bore numbered 1 was generally in the middle. Really hard to do with out a machine rest....after all , I am human.  And prone to lots of error.  This particular revolver will not shoot lead either....after no more than a half dozen rounds , its leaded so badly , accuracy suffers greatly.  I've tried numerous different brands.  No G.C.s though , may as well shoot XTPs.  Now, thats what it gets...XTPs.
 
regards , irold

[anachronism]

If the chambers aren't bored straight, it would be hard to catch. I did have an early Redhawk that had this problem. I couldn't hit the broad side of a barn with it from the inside. It finally dawned on me to look at the firing pin strikes on the spent primers. So I fired 6 shots, and opened the cylinder to look at the primers while the empty cases were still loaded. Instead of being pretty much centered on the primer, the strikes were all over the primers. Some were high, some were low, some left, some right, etc. I truly had a bad cylinder, which Ruger replaced free of charge. It took me a long time to think of simply looking at the primer strikes on fired cases. This revolver passed range rod at the throats, so it drove me nuts trying to figure out what was wrong. Your leading problem could be thread choke in the barrel where it screws into the frame. This is a pretty common ailment for late model Redhawks for some reason.

[irold]

Never thought to look at the primer strikes.......good thought.  The leading is another issue...I've finally given up , as stated , I use XTPs.  That solves the leading issue .    Thanks for the tip
 
regards , irold

[anachronism]

Before giving up on cast, make certain your barrel isn't choked at the frame juncture. This causes a lot of issues, even accuracy problems with jacketed bullets, and it could even contribute to slightly slow muzzle velocities.