What bullets do you recommend for a 50 caliber gun shooting 100 gr. I want knock down power and deadly accuaracy for deer.

I would go with the percision QT' S 40
http://www.prbullet.com/

What brand and model gun ya got there? We need to know it' s rifling twist rate to make recommendations.

I' ll presume you are using an in-line, 1:28 twist, .50 caliber, and hunting in the same state as I am-- and using 100 grains of Pyrodex RS or Triple 7. That is a lot of presuming.

In that case, there are three bullets that are worth a try-- and just stick with what your gun shoots the best:

prbullet.com 300 grain Dead Center (.44 ca / .50 cal sabot)

Buffalo SSB 325 grain sabot

Powerbelt 348 grain

Randy, you got some of your assumptions correct. In-line, 1-28 twist, 50 caliber, 100 gr. pyrodex pellets

I mentioned this on another topic, but anyway, I took a nice 5x5 elk a few weeks ago with a .50 cal and 100 gr 777 with the 348 Aerotip (Powerbelt). At a slight angle, the bullet passed through nearly 3 ft of elk and lodged on the opposite side against the hide and the bullet was a near perfect " mushroom" . Almost 100% retention. Prett cool to find the slug in perfect shape. It was only about 80 yards, but when I hit him he side stepped twice and tipped over.

Cast Preformance 45 cal. 265 gr. WFNGC, or 300 gr. LFNGC.

Read my post on Cast Preformance LBT' s just above or below your post.

Good luck.