Have participated at T.I.T.S. several times over the years, including a couple of "Provincial" shoots, and pacing a couple of our Olympic hopefuls prior to their travel to Atlanta to take part in the big show.
Last watched the ladies shooting trench at the Pan-Am games here a couple of years back ... renewing my acquaintance with competitor Susan Natttrass whom I hadn't seen for several years. She made me promise
not to tell how old we were !
If you ever have the opportunity, give the International ( "Olympic" )Trench a whirl. Six shooters, 5 stations (one is in rotation after each shot) 70 meter ta rgets, 2 shots allowable at each. Virtually flat to a very steep rise,
45 degree separation ( ATA is 50 yard targets 38 degree separation I believe ) Hard left and right angles are very hard indeed. Shot with 24 gram loads, a fraction less than 7/8 oz. @ 1325 fps. +.
After a few rounds at the trench, ATA targets will look like garbage can lids, barely moving fast enough to make the distance. Google up the ISSF Rule books to see the layout, rules and procedures.