I agree with Axxe Either buy factory loaded shells a few boxes at a time. Or seek out the "Cafeteria" type loads Chains flechetes etc etc.. from on line sellers.
If your going to hand load your own it really makes no sense ,other than personal want to mix various grades of bb's. Keep loads to specific shot size. Be it slug,buck,or bird shot keeps things simple.
'Steel cuts flesh / steel cuts bone / steel does not cut steel.'
Become steel or get cut.