Nice target gun! How do you manage to drive the pin out of the frame/barrel area and how do you re-install it properly?
Thanks. A set of special Smith & Wesson concave tip pin punches is (was?) available from Brownells. The existing frame holes serve as excellent drilling guides for creasing the top of the barrel for the pin just right, after the barrel has been tightened and aligned. Alignment methods were described earlier in this thread. The whole barrel switching process may appear intimidating, but it is actually surprisingly easy.
Reinstallation of the barrel pin can safety be omitted, if drilling is not desired. A properly made barrel is cinched up sufficiently tight, when correctly aligned, to prevent further barrel rotation under normal shooting conditions. However, even if it were to move, the direction of the rifling twist would cause bullet torque to tighten, not loosen, the barrel. So, worst case, bullets start hitting just a wee bit right of the point of aim.
