Congrats on the downed deer!

Looks like you're getting in close, less than 100yard shots. I might suggest you go with a 348g PowerBelt and 80g of powder put that load behind the shoulder from 20-120yards and it's lights out Just get yourself some of those 30g pellets ta go with your 50grainers and you're all set.

I also like the 200g Shockwave in the Blue sabot, made for the 50cal rifle. If this will group good for ya, then put in 100g of powder and let fly! Acts like a 30.30 on steroids

Are those 250g shockwaves u are using the ones with the Yellow or Blue tips?