I spoke with Trijicon and Leupold recently and they said that my RMR Type2 3.25 and my DPP with the red Delta, would be just fine with any firearm, including my 3.5" 460 and my No.1H in 458.
They said we guarantee them to hold up.
I know Leupold stands behind their guarantee, so I'll use the DPP with those Hornady 200gr FTX rounds.
Both held up to medium loads as mounted in the old pic below.
Will make a proper/longer mount now that I have parallels for the mill's vise.
Read that Leupold is not making any handgun scopes now.