Many old time mechanics and automotive repair shops do not keep current on cams, components designs and improvements.
Most manufactures will suggest a safe limit below what the actual component will live up to such as valve spring pressures, did you verify all the valve springs pressures at the actual installed heights and did you verify that you had at least .060 on each spring clearances from coil bind at max lift? If not do that now before running the motor
As far as those pressures on a broken in cam your good in my opinion, I've used those type pressures for years on both hydraulic and solid lifter flat tappet cams and lifters
Also did you check the actual lift at the retainers with the new rocker arms to verify the true ratios? If not check at least two or more at the retainers, both left and right hand rockers
Mr. Murphy lurks waiting to pounce on unsuspecting hot rodders and racers