Cast bullets are a wonderful solution IF your barrel is smooth enough. I shoot an RCBS 200 gr Cast bullet in my .358, air cooled wheel weights @ 2400+ fps with no leading. Accuracy is about 1.5" for 5 shots at 100 yards. My Chapuis 9.3mm has rough barrels and leads with the same bullet alloy at ~2300 fps. There are casting techniques that often can eliminate leading, but those are too involved for this post. I'm currently trying heat treated bullets to see if that will solve the leading problem with the Chapuis. Check the CASTBOOLITS site as those folks are always willing to help. Do a search on the archives and you will most likely find the answers you are looking for without having to post. Bottom line is for rifle use (velcities >~1300 fps +/-) always use a gas checked bullet. Size the bullet ~ .002 over groove diameter. Use a good lube with a reputation for high velocity. LBT Blue, Rooster Red, LARS Carnuba Red...there are others. Always "bell" your case mouths before seating the bullet to avoid bullet damage. Use the slowest powder you can that will still give you regulation. FWIW...Pilgrim