I have three slug gun an A bolt which is a tack driver, a Rossi single shot takedown for back up and easy storage and a Mossy 935 with 24" rifled barrel.
Been shooting my 300wm on a light rifle (T3 lite SS) and my Zkk602 in 375 ouch & ouch since the 90s so I am no recoil shy but firing a 600gr at 1900fps makes me hesitate to shoot off the bench especially on a 7.5# gun.
I may dress myself up with a sissy pad before shooting it lol.
To got juice,
What action was your 585 built on?
I always have a crave for big bore and I still have that issue of Guns& Ammo from the 90s when Ross Seyfried developed that round and built on a Brno action.