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Bore Hole Guns, or Tollpholl Guns, were a type of artillery produced by the Gabha Manufactories made in the foundry in Dún.

System of production

In the previous system, which was quite prone to failure, centered around casting the canon in a single step with the molten metal (bronze or iron being the most common) being poured around a clay core. With the clay removed after the canon had cooled, the bore remained imperfect - much of the gunpowder's energy was lost due to that, as tight-fitting canonballs could not be made.

The Tollpholl System, on the other hand, cast a single, large block, with the bore being drilled into that block on a large machine, the new canon being rotated against the machine. This allowed these guns to be shorter and lighter without sacraficing range and firepower, as well as tighter manufacturing tolerances between bores and balls.

Weights

The guns were available in several weights and lengths:

  • Long Eight Pounder: A bit over a ton in weight, the Long Eight Pounder was less of a field piece and more of a highly mobile field piece with a range of
  • Short Eight Pounder: An artillery piece of 850 kg in weight (on average, with carriage), with an maximum range of 1,500 metres (effective range 800 m with shot and 500 m with canister), crewed by 13 men and dragged by four horses. Field artillery piece.
  • Short Four Pounders: An artillery piece of 675 kg in weight (on average, with carriage), with an maximum range of 1,200 metres (effective range 700 m with shot and 400 m with Canister), crewed by six to eight men, dragged by three to four horses.

Despite the possibility for it, Gabha did not decorate their guns, except when on request.

History

The canons made their debut in 1718 during the Leuda Spring Festival.

In 1903, during the Battle of Anfa Ridge, the Younger Militia of Inis fielded two batteries Short Four Pounders, the last known usage of Bore Hole Guns in combat.

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