for what it is worth--killed my first deer with the Lyman 410459 Keithy bullet-- entrance in hide was basically 41+ hole just like in paper-- in the heart was larger thumb sized -- about .70+ mv 1200--6.5 Blackhawk @ 45 long steps nothing has changed since then
I have that mold and a Saeco .411 230 gr with Lyman having a .255 meplat the Saeco .270
but when I have used my Mountain Mold .41 255gr LWNGC with a .33 meplat the entrance hole in the hide of deer or boar has been about 1" with shots around 40 45 yards& quite destructive to lungs and such
both will kill & both will shoot well if I do my part -- on deer or the boar I have taken ( biggest was 280 dead weight and deer 198#) it probably does not matter - both look good to me -- but the larger Meplat does tear a bigger hole