When I had a Myford, I found that the Myford gun supplied a lot of oil, all over the machine, including me, except where it should go.
A Reilang oil gun , fairly expensive, but it puts the oil through the ball oilers with minimal loss; and can generate quite a bit of pressure. Have never regretted buying it.
My BL12/24 (WArco BH600/Chester Craftsman lookalike) had an oiler for the power feed control that was inaccessible, right beneath the cross slide handwheel. In great trepidation, stripped off the control, removed the ball oiler (destroyed it in the process), plugged the original hole, and drilled another 6mm hole where it would be accessible, fitted a new ball oiler, and then reassembled.
For normal hydraulic grease nipples, i use an old CHEAP side lever grease gun with a flexible extension.
For Changewheels, I smear grease over as much as posible and rely on rotation to spread it to the other teeth.
Or one of the aerosol cans of chain/gear lubricant is even better.
Howard