MadDogDan Posted July 28, 2005 Report Share Posted July 28, 2005 I have a semi-auto Thompson 1927A-1 (sorry it's not NFA but I didn't know who to ask) with the adjustable ladder type rear sight. I don't know the distances for the increment marks on the ladder and would have to shoot a shit load of ammo to figure them out. Can anyone help? Does anyone know how many yards correspond with each mark? Any help you could provide would be greatly appreciated, MadDog http://www.machinegunbooks.com/forums/invboard1_1_2/upload/html/emoticons/unsure.gif Link to comment Share on other sites More sharing options...
Grey Crow Posted July 29, 2005 Report Share Posted July 29, 2005 MadDog, I set my site at 5 for 125 yards. Its something you will need to play with. Other factors are involved like load and bullet weight. Let alone the fact that each gun a little differant. Link to comment Share on other sites More sharing options...
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