Well I have found a load that works and does not foul the polygonal rifling at all.
4.0 gr W231, WSP and using a Russell LRN.
The key is the bullet its made by a caster which my club buys from, The secret is the Brinell 18 hardness of the bullet, its similar to a jacketed bullet.
Sorry no Jacketed at our club due to a Zoning restriction, It was cop killer bullet year that year when the building was enlarged, and the brain trust that turned out for the zoning hearing included the Deputy Attorney General, who was worried we would shoot them thar kop killer bullets at our range, so No jacketed was put in the zoning variance.
