Originally Posted by RobF
(Ever drilled through the hammer all the way through?)
I've seen a few 10m hammers that have a hole all the way through but assumed this was just reducing the weight as these hammers are also more reduced on the outside than our 12ft/lbs ones. I've seen them with 3mm & 4mm holes inside & when filled with Tungsten TIG electrode the 4mm ones weigh the same as the 12ft/lbs ones.
At one time I considered grinding 4 longitudinal slots along the length of the hammer to see if it would fly faster but then I couldn't be bothered as the gun worked just fine