Berrien Moore: I think well of the Seller & Bellot, it is just on backorder everywhere I once obtained it. I made a 250 yd kill on a whitetail buck with it. The bullet had suffered some damage but it is so long it just kept on going and got the job done. The shot was taken with a Funk drilling from a cliff, yardage measured by rangefinder. I still suspect that penetration from an homogenous round would be improved over the lead rounds. The 250 grain bullets would probably shoot flatter at greater range. I would imagine that your Neptune will be an accurate gun, as they are very well made. There is a gentleman in Alaska who has killed about everything with a Neptune, though I don't remember the caliber. You are visiting a great site to learn everything drilling. Good luck! Steve