Im guessing with todays technology that even though the Powderhorn is an in-expensive scope the building of them has come a long way, and there usually priced in the $100 range so it's really not all that cheap.
I have some Cheap Scopes that I've spent $29 and $39 on and there still holding up after 15 years or so.
Them Powerbelts seem to shoot good, like said as long as you keep the powder charge around 80grs then you should have no problem with them as long as you put em where there suppos-to be. When you try and push them too hard is where the problems start.
Will that MLer handle a Mag Load of 150grs? if so and reguardless of where it shoots and you want to put her to the test give a Mag Load a try, if the scope holds up to that then Im sure you'll have no problems down the road.
Nice Shooting and another good report!
(BP)