今日でも数百のパロット砲の砲身が残存しており、戦争記念公園や郡庁舎、博物館などに展示されている。これらにはウエストポイント鋳造工場(West Point Foundry)のイニシャル「WPF」に加えてロバート・P・パロット(Robert P. Parrott)のイニシャル「RPP」が刻印されており、容易に識別できる。最初に製造されたシリアルナンバー1番のパロット砲砲身も、ペンシルベニア州ハノヴァーのセントラル・スクウェアに、ハノヴァーの戦いの追悼展示品として新しい砲架と共に保存されている。現存する砲身の一覧はthe National Register of Surviving Civil War Artilleryにて参照できる[8]。
The Washington Republicanは10インチ・パロット砲の技術的功績を次のように伝えている[11]:
The breaching power of the 10-inch 300-pounder Parrott rifled gun, now about to be used against the brick walls of Fort Sumter, will best be understood by comparing it with the ordinary 24-pounder siege gun, which was the largest gun used for breaching during the Italian War.
The 24-pounder round shot, which starts with a velocity of 1,625フィート毎秒 (495 m/s), strikes an object at the distance of 3,500ヤード (3,200 m), with a velocity of about 300フィート毎秒 (91 m/s). The 10-in rifle 300-pound shot has an initial velocity of 1,111フィート (339 m), and afterward has a remaining velocity of 700フィート毎秒 (210 m/s), at a distance of 3,500ヤード (3,200 m).
From well-known mechanical laws, the resistance which these projectiles are capable of overcoming is equal to 33,750 pounds and 1,914,150 pounds, raised one foot in a second respectively. Making allowances for the differences of the diameters of these projectiles, it will be found that their penetrating power will be 1 to 19.6. The penetration of the 24-pounder shot at 3,500ヤード (3,200 m), in brick work, is 6インチ (150 mm). The penetration of the 10-インチ (250 mm) projectile will therefore be between six and seven feet into the same material.
To use a more familiar illustration, the power of the 10-in rifle shot at the distance of 3,500ヤード (3,200 m), may be said to be equal to the united blows of 200 sledge hammers weighing 100 pounds each, falling from a height of ten feet and acting upon a drill ten inches (254 mm) in diameter. — The Washington Republican、August 12, 1863
United States War Department. Atlas to Accompany the Official Records of the Union and Confederate Armies. Washington, D.C.: Government Printing Office, 1880-1901.
Thomas, Dean, Cannons: An Introduction to Civil War Artillery, Thomas Publications, Gettysburg, 1985
James Hazlett, Edwin Olmstead, & M. Hume Parks, Field Artillery Weapons of the Civil War, University of Delaware Press, Newark, 1983
Johnson, Curt, and Richard C. Anderson, Artillery Hell: Employment of Artillery at Antietam, College Station, TX: Texas A&M University Press, 1995
Coggins, Jack, Arms and Equipment of the Civil War. Wilmington N.C.: Broadfoot Publishing Company, 1989. (Originally published 1962).