On the other hand, if the present bore is good then give the original .310 a try. On a whim, I fired mine with some original cartridges and was surprised at how well it shot (I know, never shoot the donor). Shortened .32-20 brass fills the bill (you might need to thin the rims a tad), and proper diameter heeled lead bullets are available from Buffalo Arms (cast from currently available molds). 5gr. Unique works well, bullets are thumb seated in un-sized cases making for a day's plinking with just a handful of brass, and performance is about equal to a .32-20. I upped the ante with some 10gr. 4227/115gr. cast bullet loads and she cracked like a .38 Special and hit the empty beer cans with regularity. (Pretty scientific experiment, huh?!) Point being, these old rifles can be a lot of fun as-is. (But mine's still gonna become a Hornet.)
