Heaviest hunting pellet I would try in a 124 would be the H&N Crow Magnums but these black coated Silver Bear copies sure shoot real well through must of my FWB barrels. Bought 500 count tins $2.99 a tin of (500) years ago and $3.49 - $3.99 regular price for 500. Price sure went up! They were the most accurate in them cheap Chinese made ones. Significantly more accurate than their wadcutters and pointed ones.
The Daisy Hollowpoint versions are ok so so in comparison but dirt cheap.
Predator Polymags are worth trying if you got the cash to blow at 5.43 cents a pop using PA 4+1 free or 4.89 cents a pop using the 10% PA coupon code.
I have a lot of these in 177s stocked up but only use these expensive pellets if I need to kill larger crittera from low to medium powered guns.