i have been trying to shoot a 25-25 at singles trap with my 20ga shotguns and the best i,ve been able to do is 23-25,s. shooting 7/8 oz #7.5 and 8 shot. i have shot quite a few 25-25,s and 50-50,s with 12ga shotguns. the one 25-25 i,m realy proud of is the one i shot with a remington model 1900 12ga with 32 inch steel barrels choked F&F made in 1906, that one realy ment a lot to me. we are going to shoot singles trap this afternoon, if it don,t rain and i want to shoot a old win model 12 tounament grade 12ga made in 1928 and a rem 1100 20ga on a 12ga frame that mike orlan put chokes tubes in it. eastbank. IT RAINED,I DID GET ONE ROUND OF TRAP IN AND SHOT A 23-25 WITH THE BT-100.