Iron-type golf club head or other ball striking device

An iron-type golf club head, comprising:

• a face comprising a substantially flat ball striking surface with a plurality of grooves,
• a body comprising a hosel, a heel side, a toe side, a toe surface, a top surface, and a sole surface, and
• an elongated channel,
• wherein the elongated channel is located on the sole surface and the toe surface and spaced backward from a leading edge, the elongated channel being recessed from the sole surface and the toe surface,
• wherein the elongated channel has a depth of recession from the sole surface and the toe surface, and a length defined between a first end located in the heel side and a second end located on the toe surface,
• wherein the elongated channel has a forward wall and a rear wall,
• wherein an acute angle is formed between the forward wall and the rear wall,
• wherein a plurality of weighting elements are positioned on the sole surface and the toe surface with at least one of the plurality of weighting elements oriented along an axis substantially perpendicular to the sole surface,
• wherein the plurality of weighting elements comprise threading and are removable,
• wherein the iron-type golf club contains a hollow interior and
• wherein the plurality of weighting elements are separate from and positioned rearward of the elongated channel.

An iron-type golf club head, comprising:

• a face comprising a substantially flat ball striking surface with a plurality of grooves,
• a body comprising a hosel, a heel side, a toe side, a toe surface, a top surface, and a sole surface,
• a rear body member enclosing a hollow interior,
• an elongated channel located on the sole surface and the toe surface and being spaced backward from a leading edge, the elongated channel being recessed from the sole surface and the toe surface,
• a first weighting element,
• a second weighting element, and
• a third weighting element,
• wherein the elongated channel has a depth of recession from the sole surface and the toe surface and a length defined between a first end located in the heel side and a second end located on the toe surface,
• wherein the elongated channel has a forward wall and a rear wall,
• wherein an acute angle is formed between the forward wall and the rear wall
• wherein the first weighting element, the second weighting element, and the third weighting element comprise threading and are removable,
• wherein the iron-type golf club head has an overall sole thickness within a range between 13 mm and 31 mm, and
• wherein the plurality of weighting elements are separate from and positioned rearward of the elongated channel.