I'm jealous about the Browning rifle. Hunted with a guy quite awhile back who used one to good effect on mule deer. Was with him when he popped a nice 3 point at 80 to 90 yards. DOA! Hit in the ribs the ball was in the opposite side ribs and was flattened out to almost an inch. At that range, he said he was happy he didn't hit it in the shoulder as he wasn't sure it the ball would have made it thru to the vitals. It was a gorgeous rifle and he said it raised eyebrows at the rondezvous' he had recently attended. Saw one at a gun store in Boise a few years later. Talked myself into not needing it. Been kicking myself in the ass ever since.
As I recall, his load was 105 grain of ffg black powder (he said he would never insult that rifle by using a substitute powder), a .530 Hornady round ball and a .15 wonder lubed patch. It was a tight load and took some effort to push down the barrel but paid off down range.