I believe you mentioned a the load of a 148 gr dewc and 5 grs of Bullseye in 357 brass. So I figured I give it a try I used the Lyman 358495 and that load in my 4" no dash 686 . It worked very well infact one of the best loads I've tried so fare at 25 yds I shot 3, 6 rd groupsthe biggest was 3" for me and my eyes that's darn good ! Don't know what speed it was going but I'm sure it would shot through anything I needed it to .