.430" Keith's in a Model 29?

[LAH]

A lot of good stuff there.

 

[ScottJ]

You might want to run that 9.5gr Unique across a chrono. You might find it a bit warmish.

I just tested 8.8gr behind a Lee tumble lube 240 this past Saturday and got 1065 on average out of my 6.5" 629 Classic.

It's a fun and accurate load.

 

[ColColt]

This thread reminds me of the problem I had with my Ruger GP100. Bullets were sized according to throat diameter....358". I used HS-6 and the Lyman 358421 bullet using wheel weights a 2% tin. Accuracy was good but I got leading just forward of the forcing cone just into the rifling for about 1/2"-1". Turns out the barrel to frame junction was constricted so in essence even though the bullet was of the proper size it was being resized as it passed through where the barrel was screwed into the frame. Cure?-fire lapping.

As for the small bullets, I had to send my mold off and get the bands enlarged so they fell from the mold .002-.003" more so I could size them .432" on my M29-3. My throats as well are .432" and my mold dropped bullets at .430" maximum regardless the alloy. Now, using ww's they drop at .435" and I have a .432" die and there is no longer leading at the muzzle or forcing cone area. Fortunately, there is no restriction problem with the M29-3 I just didn't have the proper size mold and size die early on.