SBH cyl. throat diameter measure

[GSP7]

Kinda want to do a little survey.

What do your Super BlackHawk cylinder throats measure?

And OM or NM or maybe year of manufacture?

Thanks Rick

[Wally]

Mine is a NM from 1974...a .429" sized bullet can be pushed through with a bit of force--a .430" takes a lot more effort. I don't have pin gauges to measure

[mdi]

.431"

[L Ross]

New Model, .431" pin gage is a perfect slip fit in all six holes. Barrel slugs .429" a match made in cast boolit heaven and it shoots like it too.

Duke

[fecmech]

A 1970 old model 3 screw.433 and .434. Needs to be sized .433 to prevent leading with .44 spl loads, .430 and max mag loads are ok. I now size everything .433.

[GSP7]

Good stuff, keep them coming

[44man]

I bought my 10" stainless silhouette SBH when it first came out, early 80's.
.430" bore and .4324" throats.

[DragoonDrake]

My silhouette is .431'', both of my new models are .430''. Honestly I was very surprised at the consistency. I expected them to be larger or inconsistent between all three.

[looseprojectile]

7.5" barrel. Groove is .430"
Chamber mouths .434"


Life is good

[Doc Highwall]

My S&W 29 silhouette cylinder throats take a .434" minus cyl plug.

[Char-Gar]

I have 1961 vintage SBH and the groove diameter is .431 and the cylinder throats are .432. I shoot .432 bullets with very good effect in that pistol. It is a great sixgun.

[fecmech]

From these posts it looks like any relationship between quality control and actual is purely coincidental!

[2Tite]

My Long Colt measures .454 in each chamber. I'm not sure about the 45 ACP cylinder as I've never fired it. The 44 Special is .432 in each chamber.

[GSaltzman]

Bisley 45 Colt .455
Lipsey's flat top Bisley 44 spl .431
SBH 44 mag .431

[MtGun44]

Old SBH, don't know the year, but throats are big, about .432 or 3 IIRC.

Bill

[looseprojectile]

I owned and shot the Super Blackhawks and they all shot like a rifle, quite accurate. I have made a lot of hits that were ledgendary. [had witnesses]. I have had seven SBHs. I gave one away once.
With my new found knowledge about throats and groove dimensions I have to think either I was lucky or these guns are quite forgiving as to boolit size.
All Ruger single actions have been good for me. [I completely wore out two .357 flattops.] Most all the boolits I fired in the SBHs I cast in the moulds that I still have and they are all around .429" as cast. And the .357 boolits were cast in a H&G four cavity mould that dropped at .356" Most are gas checked. All loads were near nuclear in power. Powder was cheap so I could use a lot. Boolit metal was the ledgendary mystery metal. Mostly as hard as I could make it. Did not know about water quenching fifty years ago.
Just recently I bought an old model SBH and intend to re- live my youth.
Now with my new found knowledge of groove and throat and boolit size how can I have any confidence that the recently acquired gun will perform like the ones did in the past when I was young?
I think my point in all this is that I hope with all things, especially boolit size being correct I can expect to do well.
I can always blame poor shooting on my new found age.:groner:


Life is good

[fecmech]

I owned and shot the Super Blackhawks and they all shot like a rifle, quite accurate. I have made a lot of hits that were ledgendary. [had witnesses]. I have had seven SBHs. I gave one away once.
With my new found knowledge about throats and groove dimensions I have to think either I was lucky or these guns are quite forgiving as to boolit size.




Life is good
I was very much like you, 25/296 and 429421 and that was what I shot and it shot well. It was not until a few years back when I tried to shoot .44 special loads in my .433 throats that I got the lesson in sizing. The gun that would do 2.5"@ 50 yds with mags would not stay on a piece of 8 x10 paper at that range with specials and the barrel looked like the inside of a cast iron sewer pipe from leading. Now, "Beagling" and sizing to .433 I get lead free, excellent special groups and improved mag groups ( which I rarely shoot any more).

[Char-Gar]

A couple of thoughts..

1. Folks make too much "to do about this cylinder throat and barrel groove thing. The main thing is that the cylinder throats be larger than the groove diameter and the bullets either fit the throats or soft enough to slug up to fill the throats. All of this water drop nonsense has pretty much done away with bullets slugging up, and is the cause of more problems than it solves.

I have measured over 150 Colt, Smith and Wesson and Ruger sixguns over the past decades and they all show a wide variety of dimensions.

[jmsj]

2010 Bisley Super Blackhawk Hunter .431. I was relieved to find the throats all uniform and large enough.
I have a Bisley .45 colt whose throats originally measured between .449-.451. I bought a reamer from WhiteEagle a while back and now they are all .453
jmsj

[Char-Gar]

It has always been a mystery to my how Ruger has always done .357/38 and 44 cylinders right, and produced 45 revolvers with way small cylinder throats. I never could figure out what their thinking was. They could have sold more sixguns with .452-454 cylinders throats.

[S.R.Custom]

I've worked on about 6 SBHs this year. And every one has had at least one chamber large enough that required the rest to be honed out to .432". Groove diameters have been running .430" to almost .431".

[W.R.Buchanan]

I have a .44 Mag SBH Bisley, and a Blackhawk Bisley in .44 Spec.

I just measured the throats last week.

The .44mag has .431-.4315 throats, and the .44 Spec has .4305-.431 throats. both barrels are .430.

The .44 Mags chambers are rough and have alot of reamer marks. The .44 Spec has perfect chambers , and no marks whatsoever.

Guns were 2009, 2010 Mfg.