What you're getting is a $50 scope and $20 aluminum rings/base.... not good enough for 300 gr bullets & close-to 100 grains equivalent of Pyrodex/Real Black.

Alot of stores sell a one-piece aluminum ring/base for around $16. You can get a Bushnell Banner Dusk To Dawn 1.5-4.5X32 for around $69 online at Bass Pro .. maybe even Cabelas. It's more shock-resistant than the Cabelas Pine Ridge offering. Mine has handled 80 grains 777 FFF with 405 gr Buffalo conical in my 58-cal sidelock for over 400 firings thus far.

Your present 300 grain TC Shockwave with 80 grains of loose Triple 7 in your Optima Pro should be energy-fine for deer-sized game out to 150 yards max.

Yes... 150 gr loads are more talk than show in most guns. People get excited because average shotgun bores only shoot well to 100 yards unless you invest in rifled barrels & sabots for a measely extra 25-50 yards in "average" gain. Inlines easily conquer 200 yards with only adding around 15 powder grains to those former 140 yard shots.

Put 105 gr 777 FFF in your Optima.... that will reach-out to 200 yards nicely. You can shoot 200 yards with your 80 grains, but foot-pounds in energy at 200 yards are borderline ethical for harvesting deer (my ethics... not the next disputing poster's)