If you run dirty loads, you will see build up on this yoke part here as it goes into the cylinder. I had been apart of a few threads where certain members mentioned binding and such. Or not being able to run 3 or 400 rounds consecutively. Not true. Sort of.
You see , I've all ways run clean 38s and clean 357s . Not underpowered in any way. Certain manufacturers have dirty ammo. You need to see which will best suit your needs. I couldn't tell you which. I think the last time I've bought a box of ammo was 10 years ago! And I still haven't fired it. (Hollowpoints) The most I've shot out of a 66-8 4.25" is about 400 rounds at one range visit.
So, it's all subjective to ones experiences. S&W will not sell you a bad gun on purpose. Or at least that's been my experience.
All I kept was the yoke well sprayed with rem oil(didn't remove it like in the picture shown till 900 rounds!). No great science there. And never had an issue.


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