An acquaintance wants to sell me a keg of Dupont 3Fg. Is this suitable for use in my Shiloh Sharps .45-70? The bullet I'm beginning to work with is a Saeco 645 63D which weighs 480 gr. I am interested in the Quigley Shoot and may be able to go in 2026. I understand I might need a heavier bullet. My pressing question is should I get the keg of 3Fg? Very good price.