Bore ride section of this bullet was too small diameter so i had to make mold cast bigger. Here is the way I beagled a steel Lyman 224 caliber mold. I used a spring loaded center punch to raise four areas on one mold half (halve without alignment pins). The spring loaded punch delivers equal pressure to raise these points equally. Next I sanded raised areas on a flat surface such as a piece of glass and 1500 sandpaper. Sand off more of raised area if bullets cast too large. If you sand off too much, just go back and snap or repunch each crater made by punch to raise again. Drive alignment pins in deeper using a 1/8” flat punch if mold halves do not align because of .002 gap between halves.
This method does not interfere with venting like aluminum tape method will.