I have an A-5 12 magnum and have a set of Invector tubes for it. They each give a lead and a steel indication on them.
I also have the following that were given to me:

1. Browning Midas Grade Standard Invector Extended Choke Tube - Light Modified - made by Briley

2. Pure Gold - MOD - Winchoke - Mod/Lead - Full/Steel - Ported

3. Pure Gold - IC - Winchoke - IC/Lead - MOD/Steel - Ported

4. HS - Undertaker - Winchester - .700 - Says recommended for BB, BBB, & T shot.

Anyone have any experience using any of these in their A-5?

Thanks,

olepal