My Lyman Great Plains Hunter in .54 Shoots Both Grease Groove And Paper Patch Really well, For a Good Hunting Bullet that i can trust to Stay put on the Powder Charge Day in and Day out, I Personally prefer my Grease Grooves. I really enjoy my Paper Patch Bullets For Bench/Target shooting, Where i can take the Time to Swab Good between Shots. If i were gonna Stand/Sit Hunt for Whitetail Deer i would be Fine with my Paper Patch Bullets, But my Style of Elk Hunting, and this Rugged Terrain, I don’t Trust a “Slip Fit” Bullet. I made a “Bump Test” Video showing how easily you can get a Slip Fit Paper Patch Bullet to Slide off the Powder Charge. My Grease Groove Bullets that i pour of 1-40 Alloy go down Good n Tight, And will Stay SOLIDLY Put on the Powder Charge!
As for Accuracy, A Paper Patch bullet is NO MORE accurate than a Good Grease Groove, Really Depends on the Rifle/Load, So far i have been able to get every Muzzleloader i own to Shoot both Grease Groove, and Paper Patch with Tinkering.