This bullet weighs a nominal 528 grs and is meant for paper patching. The diameter at the base is 0.454″ and about 0.450″ at the mid-point. The bullet is slightly tapered. It can be patched to match the correct diameter for your rifle and while M-H barrels are relatively uniform, patching is a good way to obtain the optimum fit. The bullets are a moderate hardness with a Brinnell value of 11.5 – 12.5. By comparison, wheelweights are typically 9 and Lyman #2 alloy is at 15. They are priced per/50 bullets. Shipping weight is 1850 g/50 bullets. The bullets are not lubed.