too small of neck diameter, with too soft of bullet can bulge the bullet on reloading. mike the bullet nose before and after reloading to see if you r expanding the nose upon loading.. .. sometimes you can take the tin out of the lead by not fluxing the lead once in awhile that will put the tin back into the mix so it will stay hard.. youll encounter many problems goint thrue this, but this will take time and youl figgure it out.. luckily you have forums to get anseres.. in the old days it was a real tough go. but lymans book will give you many pointers when your problem can come from so many dirrections at first.. i like a softer bullet for hunting so i need to use a larger expander than what comes with the die set that is set up for jacketed bullets.. i usually order two expanders for the rcbs dies at the same time to save on shipping and to try for accuracy for a cast bullet trials.. differnt crimps, differnt powders, differett lead hardnesses, different seating depths, differtnt size diameters,, it will take you all summer to get this all together.. i love it, others hate it.. in the meantime buy some factory moly lubed bullets to try,, they will give you an idea of what your shooting for in your cast bullets.. you can crush them too as they are not hard cast.. you can find lots of hard cast bullets for sale n the market and theywill load in standard factory dies without deforming and can give good accuracy if the right size for your boar and your boar has no bulges or inconsistenceis.. if your boar is not consistent you will need a softer bullet.. use flat nose bullets in the 30 30 and you will have to use a hard enought lead that wont change bullet shape and load seating depth in the tube.. have fun, enjoy it.. dave.