IT's "GRAY AREA"
Last customer who admitted to using stock barrel had his money returned.....LOL
Recommend KKM, Jarvis, (your choice).
Cases are pretty strong, can load to your comfort level (ALL loads are custom), and I want the 610, too (and a 10mm Witness).
For more normal users recommend CorBon, Georgia Arms, Pro Load, Triton.
Blowin' up customers is bad for business.