Hi everybody, I've been loading for my 70 cal Howdah with 16ga shells cut to 1.6" . So far I have used 20-60 gn of FFg Black, a fiber wad and a Lee 1oz 12ga slug.
With 50-60 gns it shoots good groups, the only problem is at 15 yds it shoots about 10" high. I did pickup the 7/8 oz mold, but haven't tried it yet. It's been awhile since I've chronoed it, but I seem to remember 60 gns gave around 700fps-ish.
So my questions are,
Thoughts on getting it to shoot lower.
Max safe charge? There's probably enough room for 100+ gns of FFg Black in there, but I don't want to hurt the gun. She's about 170 years old and still locks up as tight as can be.