There is exactly one person's reloads I will use besides mine, and he loads on the same equipment with the same components I use. And he's probably the only person that is more OCD than I am.
The reason I don't let others use my reloads is simple. If they malfunction on me and something catastrophic happens, I know I won't sue me. No matter who it is or what they've said, after the bang, looking down at a mangled bloody stump and twisted hunk of metal tends to get people into "Lawyer-Up" mode real quick.
Mac
FWIW, I used to run a Tanfoglio Gold Custom open class gun in .38 SuperComp. When I loaded for it, it was 7.2g of VV N350 on a 125g bullet. The powder ALMOST filled up the case, and seating the bullet created a compressed charge. This was all done on purpose. Needless to say, no one shot that thing except for me. Tell you what, though, flirting with disaster aside, pumping out 1300+fps 9MM rounds with NO recoil was a hoot!