Yes, I like, study, test, and continue to try to understand bullets. They all work. Barnes, Hornady, Speer, major bullet manufacturers all contribute to ML.
Heavy lead, Cooper, copper plated, .44, .45, .50,and various sabot combinations I won't list because every rifle /combo is different.This is all about inlines.
Heavy, I stress heavy, copper/plated 300 gr ++++ 44/50, 45/50, .50 full bore.
I like the pointy bullets high BCE. , more comfortable at longer range, under 100 they don't matter much and hollow point is fine. The .450 BM, .458 Barnes based 325g look good.
Hard pure and copper plated take a hot charge to expand. 100g measured Blackhorn it 777 ++ may be needed to expand at distance. Leaving the muzzle at around 2,000 fps at 300 yds we're looking at 1,000 lbs KE.thats marginal for deer not enough for elk.
One shot one kill.
Unless a smokeless or rated over 120 gr
Blackhorn (Paramount) Stay under 250yds for elk with these bullets.
Of course this is my opinion, based on research, personal experience, countless hours of comparing ML projectiles.
For deer in my .50 I use Harvester 300gr
.44 .430 copper jacket/bonded lead.
Green crush rib 44/50 sabot
100gr measured Blackhorn
Blue box win 209 shotgun primers
Absolute hammer on deer, scary accurate and reasonable price, bulk in 50 round box.
Take down anything in North America up to 250 yards with no hesitation.
The Speer .452 300gr copper jacket/bonded is my second choice.
In my opinion for 300yds you need either heavy lead 350gr +++/reduced charges or much increased velocity 2220fps that requires smokeless or hyper magnum Blackhorn charges.
All Powerbelts aren't bad, the ELR and Platinum are well regarded.