.429 seems a bit tight.

[tj3006]

I just pin gauged the Throats of a model 629 Classic, at .429. .430 would not go through any of the throats. 
  My Redhawk pinned at .431. I like that better. .429 would add considerable pressure if the bullet is .431 or .432. As far as accuracy, i will need to slug the bore, but .429 throats seems a bit tight. 
  I will call Fermin latter today...tj

[bradshaw]

May 14, 2024 5:52:55 GMT -5 tj3006 said:

I just pin gauged the Throats of a model 629 Classic, at .429. .430 would not go through any of the throats. 
  My Redhawk pinned at .431. I like that better. .429 would add considerable pressure if the bullet is .431 or .432. As far as accuracy, i will need to slug the bore, but .429 throats seems a bit tight. 
  I will call Fermin latter today...tj

*****

Were your new Redhawk and M-629 mine, first stop is to clean & lube, followed by a trip to the firing line. Theorizing accuracy doesn’t equal serious Target Time. Chamber exit holes of .429” are firm. I have a Freedom Arms M-83 .44 Mag with .429 exit holes and no hone need look for work on it. My Dan Wesson Arms M-44 .44 Mag won a championship shootoff with ten shots from the 8” Vent Heavy barrel that would fit a large palm from the distance of two football fields + two end zones; stock revolver, iron sights, on a uncovered firing line. The range faced northeast, allowing the late afternoon sun to reflect off the base of the Federal 240 JHP (or perhaps it was its accuracy twin, the Sierra 240 JHC). The visual made for conversation among the normally silent folks on spotting scopes. Soon after, Dan Wesson Arms measured the revolver and found .426" chamber exits! The factory opened the throats, which didn’t improve accuracy.

This first-out-of-the-factory DWA M-44 also possessed a concentric, very short and smooth 11-degree forcing cone. Chamber-to-bore runout (chamber-to-bore alignment) was close to zero (.000”).

Firm or tight chamber exit holes (throats) almost certainly would cause leading and degraded accuracy from cast bullets.
David Bradshaw

[tj3006]

Thank you David,
I certainly plan to shoot the gun be I try and fix anything. I will do that this weekend.
...tj

[cmillard]

Yes, exactly what Bradshaw said! I have had revolvers shoot exceptionally well with tight throats with jacketed bullets and some shot well with cast, but by and large, I had to correct the throats when it came to cast......lots of lead fouling.