Howdy CBK,
Yeah I looked at the Lyman site and noted that they shoow the Volunteer mold as a good one fer Whitworths, dropping at .451. But I recall that they show the Whitworth mold at .456 when cast from pure lead?
What I'm looking for is a bullet that will carry a LOT of lube and fit the bore on my 45-70. The Whitworth looks like it will fill the bill, IF it drops at .457 as stated in on the Midway and Brownells sites. (I do weird things with frontsuffer slugs, like my discovery that the .45 Maxi ball is a fantastic projectile for .45 Colt loaded with BP)