Gonna try out some 180 SST's IMR 4350 and Siroccos H4831 tomorrow and see how it does. I only have Weatherby brass.
Had really good accuracy with 200 partitions and IMR 4831. Heard about false shoulders for fire forming. Didn't really thoroughly get all the info on it. Only have RCBS FL die set. So just partially neck size to chamber with a stiff load and it should be good ? Please, only people who done it, reply.
Last edited by anothergun; 09/19/23.
