YOu are asking a MOdern Gun question. The question, and the answers are irelevent to actual performance on game.
The Lead Round ball expands even at extremely low velocities. Its a short range projectile working best at shots under 150 yards, because of its poor ballistics coefficient. But that works just fine in rifles that have IRON SIGHTS.
Modern shooters are constantly trying to make a silk purse out of a sow's ear. Its NOT GOING TO happen! Leave the scope off the rifle. Shoot real Black Powder, and use Real Pure LEAD Round Balls for hunting game.
Do some penetration testing. You can compare a lead RB's performance to that of cast bullets, and even modern rifle bullets that are jacketed. I did this when I first bought my .50 caliber rifle, and used 1" pine boards, spaced 1" apart. There are better test mediums, but when you understand the the data does NOT simulate actual balls striking live flesh and bone, ever, you use the test information for comparison, only. Use cartridge rifles that you have faith in for killing game for a COMPARISON.
My .50 caliber soft lead ball went through 6 boards and smacked into the 7th before stopping. BY COMPARISON, my .30-06 180 grain Round Nose Soft Point Remington Ammo went through only 8 boards before stopping. I was surprised that my .50 cal. did so well, even at the close range ( about 20 feet) I stood from the "box" to shoot both guns.
My first deer was shot at about 35 yards, with that .50 caliber round ball, and it broke a rib entering the lower chest, went through both lungs, and some of the major arteries about the heart, and broke a second rib before exiting. I had two blood trails on this large, older doe, as she stumbled down the steep side of the ravine to the bottom where she piled up. How Much MORE DEAD can you get??? The exit hole and the break in the off-side rib was about the size of a quarter, BTW. That is very complete expansion of the ball, in only about 4 inches of tissue and bones.
I don't know any .30 caliber rifle bullet that will expand that much, nor kill a deer any quicker with that shot placement.
So, put your ideas learned from shooting modern cartridge guns away, and begin to learn a whole different set of " rules" when working with Black Powder and traditional rifles. We have all had to do this when we started out, so don't feel like the Lone Ranger. Welcome to the forum. :grin: :thumbsup: