Own two of the 44 mag scopes. Think both are the 6-21x44. One is a few years old, bought from Natchez, and other was bought about 4 months ago from Midway. Oldest was made when Meade owned Simmons and other when Bushnell owned it. Pretty sure both were made in China. Also own several of the higher power (18X or higher) Simmons Pro Hunter models made when Meade owned Simmons. These were bought from Natchez too when Bushnell discontinued much of the Pro Hunter line and prices were reduced. They are decent scopes and I have no complaints about them.
Anyway, my older one has clearer glass than the newer one. Just can't focus the newer ones optics as well. Turrets and etc. work OK in both and they hold zero. All of my Simmons scopes have been on a number of mild to mid recoiling rifles, such as a 257R to 30-06.
Personally, I'd try out your Simmons 44 Mag before making a decision to sell it.