rbstern
03-31-2006, 04:14 PM
The load in question is a Lee 358105 SWC, air cooled wheel weights, tumble lubed, pushed by 3.5 grains of Clays and a Rem 1 1/2 primer. This is one of my favorite plinking loads, very accurate out of revolver or levergun. But in my S&W 66 revolver, I get moderate leading from this round. My Rossi M92 levergun doesn't lead with these. Tinkered with a bit more tumble lube and that helped, but still leading in the revolver that needed attention after each session.
A friend sometimes shoots my rounds in his Colt Diamondback, which seems to have very tight chambers, so I decided to do him a favor and add a Lee FCD to my Loadmaster.
I just tested my first batch made with the Lee FCD. Exactly the same load as above. And the leading was non-existent. A dramatically cleaner barrel than I am used to seeing after 50 rounds.
Is it possible that a firmer crimp is changing the dynamics of the bullet obturation enough to make this possible?
I'm a bit mystified.
A friend sometimes shoots my rounds in his Colt Diamondback, which seems to have very tight chambers, so I decided to do him a favor and add a Lee FCD to my Loadmaster.
I just tested my first batch made with the Lee FCD. Exactly the same load as above. And the leading was non-existent. A dramatically cleaner barrel than I am used to seeing after 50 rounds.
Is it possible that a firmer crimp is changing the dynamics of the bullet obturation enough to make this possible?
I'm a bit mystified.