PA,
ASA targets are about the same as IBO ! The 10 ring is the same size and general location........but there is a little 12 ring inside the 10 ring about the size of a golf ball ! It is usually positioned very low and to one side of the 10 ring ! If your shooting for it......it's very easy to barely miss and end up with an 8 hit !

So IMO shooting a 280 or 290 is the same on an ASA as an IBO shoot.......but the guys shooting for the 12's and hitting them is just incredible ! Shooting at a golf ball at 45-50 yrds is too much for me..........I'll be happy in the 270-290 range with my hunting rig !
Just curious what other folks are happy shooting ??